A milkshake is a sweet, cold beverage which is made from milk , ice cream or iced milk , and flavourings or sweeteners such as fruit syrup or chocolate sauce . Outside the United States, the drink is sometimes called a thick shake or a thick milkshake , to differentiate it from other less-viscous forms of flavoued milk .
Full-service restaurants, soda fountains , and diners usually prepare and mix the shake "by hand" from scoops of ice cream and milk in a blender or drink mixer using a stainless steel cup. Many fast food outlets do not make shakes by hand with ice cream. Instead, they make shakes in automatic milkshake machines which freeze and serve a premade milkshake mixture consisting of milk, a sweetened flavouring agent, and a thickening agent. However, some fast food outlets still follow the traditional method, and some serve milkshakes which are prepared by blending soft-serve ice cream (or ice milk ) with flavouring or syrups.
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