Butter is a dairy product made from fresh or fermented whipped cream or milk by stirring, which is rich in nutrition but high in fat.

Butter consists of tiny droplets dispersed in milk fat, and most of these tiny droplets are formed by water and milk protein. Butter can be directly applied to food as a condiment and used in cooking. It is a common material for making cakes and biscuits. Huns are the earliest people who processed edible butter in the world.