Hamburgers

Fast food

Hamburgers are often a feature of fast foodrestaurants. In the United States, the hamburger patties served by major fast food chains are usually mass-produced in factories and then frozen for delivery to the site. These hamburgers are relatively thin, differing from the traditional American hamburger prepared in homes and conventional restaurants, which is thicker and prepared by hand from ground beef. Most American hamburgers are round, but some fast-food chains, such as Wendy's, Krystal, and White Castle sell square-cut hamburgers. Hamburgers in fast food restaurants are usually grilled on a flat top, but some establishments, such as Burger King, use a gas flame grilling process. At conventional American restaurants, hamburgers may be ordered "rare" but normally are served medium-well or well-done for food safety reasons. Fast food restaurants do not usually offer this option.