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Fruit preserves are preparations of
fruit In botany, a fruit is the seed-bearing structure in flowering plants that is formed from the ovary after flowering. Fruits are the means by which flowering plants (also known as angiosperms) disseminate their seeds. Edible fruits in particu ...
s whose main preserving agent is
sugar Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose, fructose, and galactose. Compound sugars, also called disaccharides or double ...
and sometimes
acid In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a sequ ...
, often stored in glass jars and used as a
condiment A condiment is a preparation that is added to food, typically after cooking, to impart a specific Flavoring, flavor, to enhance the flavor, or to complement the dish. A table condiment or table sauce is more specifically a condiment that is serv ...
or
spread Spread may refer to: Places * Spread, West Virginia Arts, entertainment, and media * ''Spread'' (film), a 2009 film. * ''$pread'', a quarterly magazine by and for sex workers * "Spread", a song by OutKast from their 2003 album ''Speakerboxxx/T ...
. There are many varieties of fruit preserves globally, distinguished by the method of preparation, type of fruit used, and place in a meal. Sweet fruit preserves such as jams, jellies, and marmalades are often eaten at breakfast with bread or as an ingredient of a pastry or dessert, whereas more savory and acidic preserves made from " vegetable fruits" such as tomato,
squash Squash may refer to: Sports * Squash (sport), the high-speed racquet sport also known as squash racquets * Squash (professional wrestling), an extremely one-sided match in professional wrestling * Squash tennis, a game similar to squash but pla ...
or
zucchini The zucchini (; plural: zucchini or zucchinis), courgette (; plural: courgettes) or baby marrow (''Cucurbita pepo'') is a summer squash, a vining herbaceous plant whose fruit are harvested when their immature seeds and epicarp (rind) are stil ...
, are eaten alongside savory foods such as cheese, cold meats, and curries.


Techniques

There are several techniques of making jam, with or without added water. One factor depends on the natural pectin content of the ingredients. When making jam with low pectin fruits like strawberries either high pectin fruit like orange can be added, or additional pectin in the form of pectin powder, citric acid or citrus peels. Often the fruit will be heated gently in a pan to release its juices (and pectin), sometimes with a little added water, before the sugar is added. Another method is to
macerate Maceration may refer to: * Maceration (food), in food preparation * Maceration (wine), a step in wine-making ** Carbonic maceration, a wine-making technique * Maceration (sewage), in sewage treatment * Maceration (bone), a method of preparing bo ...
the fruits in sugar overnight and cooking this down to a syrup.


Regional terminology

The term ''preserves'' is usually interchangeable with ''jams'' even though ''preserves'' contain chunks or pieces of the fruit whereas ''jams'' in some regions do not. Closely related names include: ''chutney'', ''confit'', ''conserve'', ''fruit butter'', ''fruit curd'', ''fruit spread'', ''jelly'', ''cheese'' and ''
marmalade Marmalade is a fruit preserve made from the juice and peel of citrus fruits boiled with sugar and water. The well-known version is made from bitter orange. It is also made from lemons, limes, grapefruits, mandarins, sweet oranges, bergamo ...
''. Some cookbooks define preserves as cooked and gelled whole fruit (or vegetable), which includes a significant portion of the fruit. In the English-speaking world, the two terms are more strictly differentiated and, when this is not the case, the more usual generic term is 'jam'. The singular ''preserve'' or ''conserve'' is used as a collective noun for high fruit content jam, often for marketing purposes. Additionally, the name of the type of fruit preserves will also vary depending on the regional variant of English being used.


Variations


Cheong

''Cheong'' is a name for various sweetened foods in the form of syrups, marmalades, and fruit preserves in Korean cuisine. It is used as a tea base, as a honey-or-sugar substitute in cooking, and as a condiment. There are liquid varieties such as ''
maesil-cheong ''Cheong'' () is a name for various sweetened foods in the form of syrups, marmalades, and fruit preserves. In Korean cuisine, ''cheong'' is used as a tea base, as a honey-or-sugar-substitute in cooking, as a condiment, and also as an alternativ ...
'' (
plum A plum is a fruit of some species in ''Prunus'' subg. ''Prunus'.'' Dried plums are called prunes. History Plums may have been one of the first fruits domesticated by humans. Three of the most abundantly cultivated species are not found i ...
syrup In cooking, a syrup (less commonly sirup; from ar, شراب; , beverage, wine and la, sirupus) is a condiment that is a thick, viscous liquid consisting primarily of a solution of sugar in water, containing a large amount of dissolved sugars ...
),
jam Jam is a type of fruit preserve. Jam or Jammed may also refer to: Other common meanings * A firearm malfunction * Block signals ** Radio jamming ** Radar jamming and deception ** Mobile phone jammer ** Echolocation jamming Arts and entertai ...
-like varieties such as ''
yuja-cheong ''Cheong'' () is a name for various sweetened foods in the form of syrups, marmalades, and fruit preserves. In Korean cuisine, ''cheong'' is used as a tea base, as a honey-or-sugar-substitute in cooking, as a condiment, and also as an alternative ...
'' (
yuja Yuzu (''Citrus junos'', from Japanese or ) is a citrus fruit and plant in the family Rutaceae of East Asian origin. Yuzu has been cultivated mainly in East Asia, though recently also in New Zealand, Australia, Spain, Italy, and France. It ...
marmalade Marmalade is a fruit preserve made from the juice and peel of citrus fruits boiled with sugar and water. The well-known version is made from bitter orange. It is also made from lemons, limes, grapefruits, mandarins, sweet oranges, bergamo ...
), and
conserve Conserve may refer to: * Conserve (condiment), a preserve made from a mixture of fruits or vegetables * Conserve (NGO), an Indian environmental organization * Conserve (publisher), a Dutch publisher * Conserved sequence, a protein or nucleic aci ...
-like varieties such as ''
mogwa-cheong ''Cheong'' () is a name for various sweetened foods in the form of syrups, marmalades, and fruit preserves. In Korean cuisine, ''cheong'' is used as a tea base, as a honey-or-sugar-substitute in cooking, as a condiment, and also as an alternative ...
'' (preserved
quince The quince (; ''Cydonia oblonga'') is the sole member of the genus ''Cydonia'' in the Malinae subtribe (which also contains apples and pears, among other fruits) of the Rosaceae family (biology), family. It is a deciduous tree that bears hard ...
).


Chutney

A chutney is a relish of Indian origin made of fruit, spices and herbs. Although originally intended to be eaten soon after preparation, modern chutneys are often made to be sold, so require preservatives – often sugar and vinegar – to ensure they have a suitable shelf life. Mango chutney, for example, is mangoes reduced with sugar.


Confit

Confit, the past participle of the French verb ''confire'', "to preserve", is applied both to preservation of meats, and to fruits or vegetables seasoned and cooked with honey or sugar till jam-like. Savory confits, such as those made with garlic or fennel, may call for an oil, such as virgin olive oil, as the preserving agent. Konfyt (
Afrikaans Afrikaans (, ) is a West Germanic language that evolved in the Dutch Cape Colony from the Dutch vernacular of Holland proper (i.e., the Hollandic dialect) used by Dutch, French, and German settlers and their enslaved people. Afrikaans gra ...
: "jam" or "fruit preserve") is a type of jam eaten in Southern Africa. It is made by boiling selected fruit or fruits (such as strawberries, apricots, oranges, lemons, watermelons, berries, peaches, prickly pears, or others) and sugar, and optionally adding a little ginger to enhance the flavor. The origin of the term is obscure, but it is theorized that it came from the French. The word is also based on the French term ''confiture'' via the Dutch ''confident'' (meaning candied fruit).


Conserve

A conserve, or whole fruit jam, is a preserve made of fruit stewed in sugar. Traditional whole fruit preserves are particularly popular in
Eastern Europe Eastern Europe is a subregion of the Europe, European continent. As a largely ambiguous term, it has a wide range of geopolitical, geographical, ethnic, cultural, and socio-economic connotations. The vast majority of the region is covered by Russ ...
(
Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
,
Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv ...
,
Belarus Belarus,, , ; alternatively and formerly known as Byelorussia (from Russian ). officially the Republic of Belarus,; rus, Республика Беларусь, Respublika Belarus. is a landlocked country in Eastern Europe. It is bordered by R ...
) where they are called
varenye Varenye (russian: варенье, be, варэнне/варэньне, uk, варення) is a popular whole-fruit preserve, widespread in Eastern Europe (Russia, Ukraine, Belarus), as well as the Baltic region ( lt, uogienė, lv, ievārīju ...
, the
Baltic region The terms Baltic Sea Region, Baltic Rim countries (or simply the Baltic Rim), and the Baltic Sea countries/states refer to slightly different combinations of countries in the general area surrounding the Baltic Sea, mainly in Northern Europe. ...
where they are known by a native name in each of the countries ( lt, uogienė, lv, ievārījums, et, moos, ro, dulceață), as well as in many regions of
Western Western may refer to: Places *Western, Nebraska, a village in the US *Western, New York, a town in the US *Western Creek, Tasmania, a locality in Australia *Western Junction, Tasmania, a locality in Australia *Western world, countries that id ...
,
Central Central is an adjective usually referring to being in the center of some place or (mathematical) object. Central may also refer to: Directions and generalised locations * Central Africa, a region in the centre of Africa continent, also known as ...
and
Southern Southern may refer to: Businesses * China Southern Airlines, airline based in Guangzhou, China * Southern Airways, defunct US airline * Southern Air, air cargo transportation company based in Norwalk, Connecticut, US * Southern Airways Express, M ...
Asia, where they are referred to as
murabba Murabba (from ar, مربى) refers to a sweet fruit preserve which is popular in many regions of South Caucasus, Central Asia, South Asia, and the Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolit ...
. In
Southeast Europe Southeast Europe or Southeastern Europe (SEE) is a geographical subregion of Europe, consisting primarily of the Balkans. Sovereign states and territories that are included in the region are Albania, Bosnia and Herzegovina, Bulgaria, Croatia (al ...
, another version called
slatko Slatko ( sr, / ; mk, слатко, slatko; bg, сладко, sladko; meaning "sweet") is a thin fruit preserve made of fruit or rose petals in Bulgarian, Macedonian, and Serbian cuisine. Almost any kind of fruit can be used, like wild strawb ...
is made. In Greece, such confections are called
spoon sweets A spoon is a utensil consisting of a shallow bowl (also known as a head), oval or round, at the end of a handle. A type of cutlery (sometimes called flatware in the United States), especially as part of a table setting, place setting, it is used ...
and are commonly offered to guests, along with a glass of water, as a gesture of
hospitality Hospitality is the relationship between a guest and a host, wherein the host receives the guest with some amount of goodwill, including the reception and entertainment of guests, visitors, or strangers. Louis de Jaucourt, Louis, chevalier de J ...
. Outside of this geographical region, whole-fruit preserves are known in France as
confiture A confiture is any fruit jam, marmalade, paste, sweetmeat, or fruit stewed in thick syrup. Confit, the root of the word, comes from the French word ''confire'' which means literally "preserved"; a confit being any type of food that is cooked sl ...
s. The making of conserves can be trickier than making a standard jam; it requires cooking or sometimes steeping the fruit in the hot sugar mixture for just long enough to allow the flavor to be extracted from the fruit, and sugar to penetrate it, but not so long that the fruit breaks down and liquefies. This process can also be achieved by spreading the dry sugar over raw fruit in layers, and leaving for several hours to penetrate into the fruit and soak the water out, then heating the resulting mixture to bring it just to the set point. As a result of this minimal cooking, some fruits are not particularly suitable for making into conserves, because they require cooking for longer periods to avoid issues such as tough skins and spoiling. Currants and gooseberries, and a number of
plum A plum is a fruit of some species in ''Prunus'' subg. ''Prunus'.'' Dried plums are called prunes. History Plums may have been one of the first fruits domesticated by humans. Three of the most abundantly cultivated species are not found i ...
s are among these fruits. Because of this shorter cooking period, not as much pectin will be released from the fruit, and consequently conserves, particularly if home-cooked, will sometimes be slightly softer set than some jams. There is an alternative definition of a conserve: a preserve made from a mixture of fruits or vegetables. Conserves in this sense may also include dried fruit or nuts.


Fruit butter

Fruit butter, in this context, refers to a process where the whole fruit is forced through a sieve or blended after the heating process.
Fruit butter are generally made from larger fruits, such as apples, plums, peaches, or grapes. Cook until softened and run through a sieve to give a smooth consistency. After sieving, cook the pulp ... add sugar and cook as rapidly as possible with constant stirring.… The finished product should mound up when dropped from a spoon, but should not cut like jelly. Nor should there be any free liquid. : —Berolzheimer, R. (ed,) et al. (1959)


Fruit curd

Fruit curd is a dessert topping and spread usually made with lemon,
lime Lime commonly refers to: * Lime (fruit), a green citrus fruit * Lime (material), inorganic materials containing calcium, usually calcium oxide or calcium hydroxide * Lime (color), a color between yellow and green Lime may also refer to: Botany ...
, orange, or
raspberry The raspberry is the edible fruit of a multitude of plant species in the genus ''Rubus'' of the rose family, most of which are in the subgenus '' Idaeobatus''. The name also applies to these plants themselves. Raspberries are perennial with w ...
. The basic ingredients are beaten egg yolks, sugar, fruit juice and
zest Zest may refer to: Common usage * Zest (ingredient), the outer peel of a citrus fruit ** Zester, a tool for preparing zest ** Twist (cocktail garnish), a piece of zest * Zest (positive psychology), a component of character Brands * Zest (brand ...
which are gently cooked together until thick and then allowed to cool, forming a soft, smooth, flavorful spread. Some recipes also include
egg whites Egg white is the clear liquid (also called the albumen or the glair/glaire) contained within an egg. In chickens it is formed from the layers of secretions of the anterior section of the hen's oviduct during the passage of the egg. It forms arou ...
or butter.


Fruit spread

In the United States the
FDA The United States Food and Drug Administration (FDA or US FDA) is a federal agency of the Department of Health and Human Services. The FDA is responsible for protecting and promoting public health through the control and supervision of food ...
has ''Requirements for Specific Standardized Fruit Butters, Jellies, Preserves, and Related Products'', "fruit spread" is not defined. The term is sometimes used for a jam or preserve with no added sugar, but there are many foodstuffs described as "fruit spreads" by leading manufacturers that do contain added sugar.


Jam

Jam refers to a product made of whole fruit cut into pieces or crushed, then heated with water and sugar until it reaches "jelling" or "setting" point, which is achieved through the action of natural or added
pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
. It is then sealed in containers. Jam making became "a great new industry" in 19th century England, at which point English jam makers were jam makers for the world, thriving after the repeal of sugar duties in 1874.
Pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
is mainly D-galacturonic acid connected by α (1–4) glycosidic linkages. The side chains of pectin may contain small amounts of other sugars such as L-fructose, D-glucose, D-mannose, and D-xylose. In jams, pectin thickens the final product via cross-linking of the large polymer chains. Recipes without added pectin use the natural pectin in the fruit to set. Tart
apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wh ...
s, sour
blackberries The blackberry is an edible fruit produced by many species in the genus ''Rubus'' in the family Rosaceae, hybrids among these species within the subgenus ''Rubus'', and hybrids between the subgenera ''Rubus'' and ''Idaeobatus''. The taxonomy of ...
,
cranberries Cranberries are a group of evergreen dwarf shrubs or trailing vines in the subgenus ''Oxycoccus'' of the genus ''Vaccinium''. In Britain, cranberry may refer to the native species ''Vaccinium oxycoccos'', while in North America, cranberry m ...
, currants,
gooseberries Gooseberry ( or (American and northern British) or (southern British)) is a common name for many species of ''Ribes'' (which also includes currants), as well as a large number of plants of similar appearance. The berries of those in the genu ...
,
Concord grape The Concord grape is a cultivar derived from the grape species ''Vitis labrusca'' (also known as fox grape) that are used as table grapes, wine grapes and juice grapes. They are often used to make grape jelly, grape juice, grape pies, grape-fl ...
s, soft
plum A plum is a fruit of some species in ''Prunus'' subg. ''Prunus'.'' Dried plums are called prunes. History Plums may have been one of the first fruits domesticated by humans. Three of the most abundantly cultivated species are not found i ...
s, and quinces work well in recipes without added pectin. Other fruits, such as apricots, blueberries, cherries, peaches, pineapple, raspberries, rhubarb, and strawberries are low in pectin. In order to set, or gel, they must be combined with one of the higher pectin fruits or used with commercially produced or homemade pectin. Use of added pectin decreases cooking time. ''Freezer jam'' is uncooked (or cooked less than 5 minutes), then stored frozen. It is popular in parts of North America for its very fresh taste.


Jelly

The category of fruit preserve referred to as a jelly (from the French ''gelée'') is a clear or translucent fruit spread made by a process similar to that used for making jam, with the additional step of filtering out the fruit pulp after the initial cooking.
Good jelly is clear and sparkling and has a fresh flavor of the fruit from which it is made. It is tender enough to quiver when moved but holds angles when cut.Berolzheimer, pp. 826–829
The characteristic clarity and jellied consistency of a jelly are qualities it shares with the gelatin-based dessert also called jelly. High pectin fruits such as quinces, apples or redcurrants are used for making jelly. In the United States, jellies made from strawberries or
concord grapes The Concord grape is a cultivar derived from the grape species ''Vitis labrusca'' (also known as fox grape) that are used as table grapes, wine grapes and juice grapes. They are often used to make grape Jelly (fruit preserves), jelly, grape juic ...
are most preferred and are used for making peanut butter and jelly sandwiches. Fruit jellies may be used in a meal or dish in a similar way to jam. Some jellies, such as
redcurrant The redcurrant or red currant (''Ribes rubrum'') is a member of the genus ''Ribes'' in the gooseberry family. It is native to western Europe. The species is widely cultivated and has escaped into the wild in many regions. Description ''Ribes r ...
, or mint, are classic accompaniments to roasted meats such as turkey, game, and lamb. A traditional method for filtering the fruit from the liquid in a jelly is through the use of a muslin or stockinette "jelly bag", suspended by string from an upturned stool over a bowl to allow the straining to occur gently under the action of gravity. Jellies need to be strained very slowly and gently to ensure the clarity of the result, as forced straining by squeezing or pressing can lead to cloudiness in the jelly. Pectin is essential to the formation of jelly because it acts as a
gelling agent A gel is a semi-solid that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady-state, although the liquid phase may still di ...
, meaning when the pectin chains combine, they create a network that results in a gel. The strength and effectiveness of the side chains and the bonds they form depend on the pH of the pectin, the optimal pH is between 2.8 and 3.2.


Marmalade

Marmalade Marmalade is a fruit preserve made from the juice and peel of citrus fruits boiled with sugar and water. The well-known version is made from bitter orange. It is also made from lemons, limes, grapefruits, mandarins, sweet oranges, bergamo ...
is a fruit preserve made from the juice and peel of
citrus fruits ''Citrus'' is a genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biologica ...
boiled with
sugar Sugar is the generic name for sweet-tasting, soluble carbohydrates, many of which are used in food. Simple sugars, also called monosaccharides, include glucose, fructose, and galactose. Compound sugars, also called disaccharides or double ...
and water. It can be produced from lemons, limes, grapefruits, mandarins, sweet oranges, bergamots and other citrus fruits, or any combination thereof. Marmalade is distinguished from
jam Jam is a type of fruit preserve. Jam or Jammed may also refer to: Other common meanings * A firearm malfunction * Block signals ** Radio jamming ** Radar jamming and deception ** Mobile phone jammer ** Echolocation jamming Arts and entertai ...
by the inclusion of citrus peel, and the use of more water, in which respect it resembles a jelly. It is distinguished from a jelly by containing pieces of fruit peel. The benchmark citrus fruit for marmalade production in Britain is the bitter Spanish
Seville orange Bitter orange, Seville orange, bigarade orange, or marmalade orange is the citrus tree ''Citrus'' × ''aurantium'' and its fruit. It is native to Southeast Asia and has been spread by humans to many parts of the world. It is probably a cross bet ...
, ''Citrus aurantium'' var. ''aurantium'', prized for its high
pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
content, which gives a good set. The peel has a distinctive bitter taste which it imparts to the preserve.


Uses

Fruit preserves are used in many food preparations and recipes; some examples include: * Spread on
toast Toast most commonly refers to: * Toast (food), bread browned with dry heat * Toast (honor), a ritual in which a drink is taken Toast may also refer to: Places * Toast, North Carolina, a census-designated place in the United States Books * '' ...
* Part of a
peanut butter and jelly sandwich A peanut butter and jelly sandwich (PB&J) consists of peanut butter and fruit preserves—jelly—spread on bread. The sandwich may be Open-faced sandwich, open-faced, made of a single slice of bread folded over, or made using two slic ...
* The key ingredient for a jam sandwich * Used to fill sandwich
biscuits A biscuit is a flour-based baked and shaped food product. In most countries biscuits are typically hard, flat, and unleavened. They are usually sweet and may be made with sugar, chocolate, icing, jam, ginger, or cinnamon. They can also b ...
* Used to sandwich two or more layers of a
cake Cake is a flour confection made from flour, sugar, and other ingredients, and is usually baked. In their oldest forms, cakes were modifications of bread, but cakes now cover a wide range of preparations that can be simple or elaborate, ...
together, notably
Victoria Sponge Sponge cake is a light cake made with egg whites, flour and sugar, sometimes leavened with baking powder. Some sponge cakes do not contain egg yolks, like angel food cake, but most of them do. Sponge cakes, leavened with beaten eggs, originated ...


Production

In general, jam is produced by taking mashed or chopped fruit or vegetable pulp and boiling it with sugar and water. The proportion of sugar and fruit varies according to the type of fruit and its ripeness, but a rough starting point is equal weights of each. When the mixture reaches a temperature of 104 °C (219 °F), the
acid In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a sequ ...
and the
pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
in the fruit react with the sugar, and the jam will set on cooling. Most home cooks work by
trial and error Trial and error is a fundamental method of problem-solving characterized by repeated, varied attempts which are continued until success, or until the practicer stops trying. According to W.H. Thorpe, the term was devised by C. Lloyd Morgan (1 ...
rather than temperature measurement, bringing the mixture to a "fast rolling
boil A boil, also called a furuncle, is a deep folliculitis, which is an infection of the hair follicle. It is most commonly caused by infection by the bacterium ''Staphylococcus aureus'', resulting in a painful swollen area on the skin caused by an ...
", watching to see if the seething mass changes
texture Texture may refer to: Science and technology * Surface texture, the texture means smoothness, roughness, or bumpiness of the surface of an object * Texture (roads), road surface characteristics with waves shorter than road roughness * Texture (c ...
, and dropping small samples on a plate to see if they run or set. Commercially produced jams are usually produced using one of two methods. The first is the open pan method, which is essentially a larger scale version of the method a home jam maker would use. This gives a traditional flavor, with some caramelization of the sugars. The second commercial process involves the use of a vacuum vessel, where the jam is placed under a vacuum, which has the effect of reducing its boiling temperature to anywhere between 65 and 80 °C depending on the recipe and the end result desired. The lower boiling temperature enables the water to be driven off as it would be when using the traditional open pan method, but with the added benefit of retaining more of the volatile flavor compounds from the fruit, preventing caramelization of the sugars, and of course reducing the overall energy required to make the product. However, once the desired amount of water has been driven off, the jam still needs to be heated briefly to for safety, to kill pathogens that would otherwise proliferate. During commercial filling it is common to use a flame to sterilize the rim and lid of jars to destroy any yeasts and molds which could cause spoilage during storage. Steam is commonly injected immediately before lidding; when the steam condenses after lidding it creates a vacuum which both helps prevent spoilage and pulls down a
tamper-evident Tamper-evident describes a device or process that makes unauthorized access to the protected object easily detected. Seals, markings, or other techniques may be tamper indicating. Tampering Tampering involves the deliberate altering or adultera ...
"safety button" when used.


Packaging

The high sugar content makes jam keep for exceedingly long times before unsealing the packaging, and for a long time at room temperature after opening, as fruit preserves are typically of low
water activity Water activity (''aw'') is the partial vapor pressure of water in a solution divided by the standard state partial vapor pressure of water. In the field of food science, the standard state is most often defined as pure water at the same tempera ...
. Glass or plastic
jar A jar is a rigid, cylindrical or slightly conical container, typically made of glass, ceramic, or plastic, with a wide mouth or opening that can be closed with a lid, screw cap, lug cap, cork stopper, roll-on cap, crimp-on cap, press-on c ...
s are often used to store jam that is not all to be used at once, as a replaceable tightly-fitting lid can be used. Other methods of packaging jam, especially for industrially produced products, include cans and plastic packets, especially used in the food service industry for individual servings.


Legal definitions


Canadian regulations

Under the Processed Products Regulations (C.R.C., c. 291), jams, jellies, citrus marmalade, and preserves are defined. Each must contain a minimum percentage of the named fruit and a minimum percentage of water-soluble solids. Jams "shall be the product made by boiling fruit, fruit pulp or canned fruit to a suitable consistency with water and a sweetening ingredient", jellies "shall be the product made by boiling fruit juice or concentrated fruit juice that is free from seeds and pulp with water and a sweetening ingredient until it acquires a gelatinous consistency." In Canada, fruit jam is categorized into two types: fruit jam and fruit jam with
pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
. Both types contain fruit,
fruit pulp The juice vesicles, also known as citrus kernels, (in aggregate, citrus pulp) of a citrus fruit are the membranous content of the fruit's endocarp. All fruits from the Citranae subtribe, subfamily Aurantioideae, and family Rutaceae have juice ves ...
or canned fruit and are boiled with water and a
sweetening Sweetness is a basic taste most commonly perceived when eating foods rich in sugars. Sweet tastes are generally regarded as pleasurable. In addition to sugars like sucrose, many other chemical compounds are sweet, including aldehydes, keton ...
ingredient. Both must have 66% water-soluble solids. Fruit jam and fruit jam with pectin may contain a class II
preservative A preservative is a substance or a chemical that is added to products such as food products, beverages, pharmaceutical drugs, paints, biological samples, cosmetics, wood, and many other products to prevent decomposition by microbial growth or by ...
, a pH adjusting agent or an
antifoaming agent A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Strictly speaking, defoamers eliminate ...
. Both types cannot contain apple or
rhubarb Rhubarb is the fleshy, edible stalks ( petioles) of species and hybrids (culinary rhubarb) of ''Rheum'' in the family Polygonaceae, which are cooked and used for food. The whole plant – a herbaceous perennial growing from short, thick rhizo ...
fruit. Though both types of jam are very similar, there are some differences in fruit percent, added pectin, and added
acidity In computer science, ACID ( atomicity, consistency, isolation, durability) is a set of properties of database transactions intended to guarantee data validity despite errors, power failures, and other mishaps. In the context of databases, a sequ ...
. Fruit jam must have at least 45% fruit and may contain added pectin to compensate for the natural pectin level found in the fruit. Fruit jam with pectin need only contain 27% fruit and is allowed to contain added acidity to compensate for the natural acidity of the fruit. In
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
, the Food and Drug Regulations of the
Food and Drugs Act The ''Food and Drugs Act'' (the ''Act'') (formal title ''An Act respecting food, drugs, cosmetics and therapeutic devices'') is an act of the Parliament of Canada regarding the production, import, export, transport across provinces and sale of f ...
of Canada categorizes jelly into two types: jelly, and jelly with
pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
. Jelly may be made from the fruit, the fruit juice, or a fruit juice concentrate, and must contain at least 62% water-soluble solids. Jelly may contain an acid ingredient that makes up for any lack in the natural acidity of the fruit, a chemical to adjust the pH, and/or an
antifoaming agent A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Strictly speaking, defoamers eliminate ...
. Jelly with pectin must be made with a minimum of 62% water-soluble solids and a minimum of 32% juice of the named fruit, and may contain an acid ingredient that compensates for the lack in the natural acidity of the fruit; the additional juice of another fruit; a gelling agent; food color; a Class II preservative (such as
benzoates Benzoates (salts of benzoic acid) can refer to: *Ammonium benzoate *Calcium benzoate *Magnesium benzoate *Potassium benzoate * Sodium benzoate Sodium benzoate is the sodium salt of benzoic acid, widely used as a food preservative (with an E num ...
,
sorbate Sorbic acid, or 2,4-hexadienoic acid, is a natural organic compound used as a food preservative. It has the chemical formula and the structure . It is a colourless solid that is slightly soluble in water and sublimes readily. It was first isol ...
s, or
nitrite The nitrite polyatomic ion, ion has the chemical formula . Nitrite (mostly sodium nitrite) is widely used throughout chemical and pharmaceutical industries. The nitrite anion is a pervasive intermediate in the nitrogen cycle in nature. The name ...
s); a chemical to adjust the pH; and/or an
antifoaming agent A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in industrial process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Strictly speaking, defoamers eliminate ...
.


European Union directives on jam

In the
European Union The European Union (EU) is a supranational political and economic union of member states that are located primarily in Europe. The union has a total area of and an estimated total population of about 447million. The EU has often been des ...
, the jam directive (Council Directive 79/693/EEC, 24 July 1979) set minimum standards for the amount of "fruit" in jam, but the definition of fruit was expanded to take account of several unusual kinds of jam made in the EU. For this purpose, "fruit" is considered to include fruits that are not usually treated in a culinary sense as fruits, such as tomatoes,
cucumber Cucumber (''Cucumis sativus'') is a widely-cultivated Vine#Horticultural climbing plants, creeping vine plant in the Cucurbitaceae family that bears usually cylindrical Fruit, fruits, which are used as culinary vegetables.
s, and pumpkins; fruits that are not normally made into jams; and vegetables that are sometimes made into jams, such as
rhubarb Rhubarb is the fleshy, edible stalks ( petioles) of species and hybrids (culinary rhubarb) of ''Rheum'' in the family Polygonaceae, which are cooked and used for food. The whole plant – a herbaceous perennial growing from short, thick rhizo ...
(the edible part of the stalks), carrots, and
sweet potato The sweet potato or sweetpotato (''Ipomoea batatas'') is a dicotyledonous plant that belongs to the Convolvulus, bindweed or morning glory family (biology), family, Convolvulaceae. Its large, starchy, sweet-tasting tuberous roots are used as a r ...
es. This definition continues to apply in the new directive, Council Directive 2001/113/EC of 20 December 2001 relating to fruit jams, jellies and marmalades and sweetened chestnut purée intended for human consumption. Extra jam is subject to somewhat stricter rules that set higher standards for the minimum fruit content (45% instead of 35% as a general rule, but lower for some fruits such as redcurrants and blackcurrants), specifying the use of unconcentrated fruit pulp, and forbidding the mixture of certain fruits and vegetables with others. Extra jelly similarly specifies that the proportion of fruit juice or aqueous extracts in the finished product must not be less than that laid down for the manufacture of extra jam.


US FDA definitions

The
U.S. Food and Drug Administration The United States Food and Drug Administration (FDA or US FDA) is a federal agency of the Department of Health and Human Services. The FDA is responsible for protecting and promoting public health through the control and supervision of food ...
(FDA) published standards of identity in 21 CFR 150, and treats jam and preserves as synonymous, but distinguishes jelly from jams and preserves. All of these are cooked and pectin-gelled fruit products, but jellies are made from fruit juice, without seeds and pulp, while jams and preserves are gelled fruit that may include the seeds and pulp. The
United States Department of Agriculture The United States Department of Agriculture (USDA) is the United States federal executive departments, federal executive department responsible for developing and executing federal laws related to farming, forestry, rural economic development, ...
offers grading service based on these standards.


See also

* Beer jam *
Confiture A confiture is any fruit jam, marmalade, paste, sweetmeat, or fruit stewed in thick syrup. Confit, the root of the word, comes from the French word ''confire'' which means literally "preserved"; a confit being any type of food that is cooked sl ...
*
Lekvar A fruit butter is a sweet spread made of fruit cooked to a paste, then lightly sweetened. It falls into the same category as jelly and jam. Apple butter and plum butter are common examples. Fruit pastes, such as quince cheese are popular in La ...
*
Lingonberry jam Lingonberry jam ( sv, lingonsylt, no, tyttebærsyltetøy, da, tyttebærsyltetøj, et, pohlamoos, fi, puolukkahillo, german: Preiselbeermarmelade, lv, brūkleņu ievārījums, lt, bruknių uogienė) is a staple of Northern European cuisine a ...
*
List of spreads This is a list of spreads. A spread is a food that is literally spread, generally with a knife, onto food items such as bread or crackers. Spreads are added to food to enhance the flavor or texture of the food, which may be considered bland witho ...
*
List of strawberry dishes This is a list of strawberry dishes, foods and beverages, which use strawberry as a primary ingredient. Several desserts use strawberries as a main ingredient, and strawberries are also used as a topping on some foods, such as French toast, waffle ...
*
Pepper jelly Pepper jelly is a preserve made with peppers, sugar, and salt in a pectin or vinegar base. The product, which rose in popularity in the United States from the 1980s to mid-1990s, can be described as a piquant mix of sweetness and heat, and is us ...
*
Quince cheese Quince cheese (also known as quince paste) is a sweet, thick jelly made of the pulp of the quince fruit. It is a common confection in several countries. Traditionally from Mediterranean. In Iberian Peninsula, it is called ''ate'' or ''dulce d ...
*
Spoon sweets A spoon is a utensil consisting of a shallow bowl (also known as a head), oval or round, at the end of a handle. A type of cutlery (sometimes called flatware in the United States), especially as part of a table setting, place setting, it is used ...
*
Tomato jam Tomato jam (also referred to as tomato jelly) is a type of fruit preserve prepared with tomatoes and sugar. Overview Green tomatoes are used in some preparations. Some preparations may use honey, and some include bacon. It has been described as ...


Notes


References


External links


The principles of jelly-making, by N.E. Goldthwaite ... Goldthwaite, N. E. (Nellie Esther), ca. 1868–1946.




{{Include-GPO Jams and jellies Food ingredients Food preservation