Frozen yogurt (also known as frogurt or by the

tradename A trade name, trading name, or business name, is a pseudonym used by companies that do not operate under their registered company name. The term for this type of alternative name is a "fictitious" business name. Registering the fictitious name w ...

Froyo; ) is a frozen dessert made with

yogurt Yogurt (; , from tr, yoğurt, also spelled yoghurt, yogourt or yoghourt) is a food produced by bacterial fermentation of milk. The bacteria used to make yogurt are known as ''yogurt cultures''. Fermentation of sugars in the milk by these bac ...

and sometimes other dairy and non-dairy products. Frozen yogurt is a frozen product containing the same basic ingredients as ice cream, but contains live bacterial cultures. Usually more tart than

ice cream Ice cream is a sweetened frozen food typically eaten as a snack or dessert. It may be made from milk or cream and is flavoured with a sweetener, either sugar or an alternative, and a spice, such as cocoa or vanilla, or with fruit such as ...

(the tanginess in part due to the

lactic acid Lactic acid is an organic acid. It has a molecular formula . It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial synthesis as well as nat ...

in the yogurt), as well as lower in fat (due to the use of milk instead of

cream Cream is a dairy product composed of the higher-fat layer skimmed from the top of milk before homogenization. In un-homogenized milk, the fat, which is less dense, eventually rises to the top. In the industrial production of cream, this process ...

), it is different from

ice milk Ice milk, or iced milk, is a frozen dessert with less than 10 percent milk fat and the same sweetener content as ice cream. Ice milk is sometimes priced lower than ice cream. A 1994 change in United States Food and Drug Administration rules all ...

and conventional

soft serve Soft serve, also known as soft ice, is a frozen dessert, similar to ice cream but softer and less dense due to air being introduced during freezing. Soft serve has been sold commercially since the late 1930s in the US. In the US, soft serve is ...

. Unlike yogurt, frozen yogurt is not regulated by the U.S.

Food and Drug Administration The United States Food and Drug Administration (FDA or US FDA) is a List of United States federal agencies, federal agency of the United States Department of Health and Human Services, Department of Health and Human Services. The FDA is respon ...

(FDA), but is regulated by some U.S. states, such as

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

Production

Frozen yogurt consists of

milk solids Powdered milk, also called milk powder, dried milk, or dry milk, is a manufactured dairy product made by evaporating milk to dryness. One purpose of drying milk is to preserve it; milk powder has a far longer shelf life than liquid milk and d ...

, some kind of sweetener,

milk fat Butterfat or milkfat is the fatty portion of milk. Milk and cream are often sold according to the amount of butterfat they contain. Composition Butterfat is mainly composed of triglycerides. Each triglyceride contains three fatty acids. Butt ...

, yogurt culture (commonly ''

Lactobacillus bulgaricus ''Lactobacillus delbrueckii'' subsp. ''bulgaricus'' (until 2014 known as ''Lactobacillus bulgaricus'') is one of over 200 published species in the ''Lactobacillus'' genome complex (LGC) and is the main bacterium used for the production of yogurt. ...

'' and ''

Streptococcus thermophilus ''Streptococcus thermophilus'' also known as ''Streptococcus salivarius ''subsp.'' thermophilus'' is a gram-positive bacterium, and a fermentative facultative anaerobe, of the '' viridans'' group. It tests negative for cytochrome, oxidase, an ...

''), plus flavorings and sometimes coloring (natural or artificial). Milk fat comprises about 0.55–6% of the yogurt; added in quantities inversely proportional to the amount of milk solids, it lends richness to the yogurt. Milk solids account for 8–14% of the yogurt volume, providing lactose for sweetness and proteins for smoothness and increased resistance to melting. Sugar (beet or cane) provides 15–17% of the yogurt ingredients; in addition to adding sweetness, it increases the volume of solid ingredients, improving body and texture. Gelatin and/or vegetable additives (

guar gum Guar gum, also called guaran, is a galactomannan polysaccharide extracted from guar beans that has thickening and stabilizing properties useful in food, feed, and industrial applications. The guar seeds are mechanically dehusked, hydrated, mil ...

carrageenan Carrageenans or carrageenins ( ; ) are a family of natural linear sulfated polysaccharides that are extracted from red edible seaweeds. Carrageenans are widely used in the food industry, for their gelling, thickening, and stabilizing properties. T ...

) stabilize the yogurt, reducing crystallization and increasing the temperature at which it will melt. This stabilization ensures that the frozen yogurt maintains a smooth consistency regardless of handling or temperature change. Major companies often use assembly lines specifically dedicated to frozen yogurt production. Milk products and stabilizing agent(s) are combined and homogenized. At , the yogurt culture is added. The mix remains at this temperature until it sets and is ready for cooling. After that, the mix is cooled at a temperature of . Once it has reached the desired temperature and

viscosity The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity quantifies the inte ...

, the yogurt is allowed to sit in aging tanks for up to four hours. Sweeteners, flavorings, and colorings are then mixed in, and the yogurt mixture is cooled at a temperature of −6 to . To create extra volume and smooth consistency, the air is incorporated into the yogurt as the mixture is agitated. With a sufficient amount of air in it, the yogurt gets rapidly frozen to prevent the formation of large ice crystals and then stored in a cold place to be shipped. Frozen yogurt can be made in a

freezer much the same way as soft ice cream. Frozen yogurt mix is sold in either powder form that needs to be mixed with water or liquid form ready to pour into a soft-serve machine. A mix with high or low-fat content can be chosen, and the amount of air introduced into the soft-serve frozen yogurt is variable. The higher the fat level, the more air the yogurt can absorb; and the more air goes into the mix as it freezes, the creamier the product will taste.

Uses

Frozen yogurt is served in a large variety of flavors and styles. It also has sugar-free and fat-free alternatives. Frozen yogurt shops usually offer a multitude of toppings, from fruit to nuts, popular cookie brands, and candies. Some companies offer a more tart version considered closer to the original recipe, whereas others focus on making their own taste more like ice cream.

References

{{Yogurts Frozen desserts Ice cream Yogurts

Production

Uses

See also

References