What is the butter in the cake made of and what is its use?

Butter is made from milk, and its main function is to flavor milk and increase its flavor.

Butter is a kind of solid grease processed from milk, which is the product of filtering some water from the upper layer of thick matter after mixing fresh milk. Mainly used as seasoning, rich in nutrition but high in fat, don't overdo it.

In the 5th century BC, Huns had matured and spread various dairy production technologies at home and abroad because they were mainly engaged in animal husbandry. What foreigners call butter is edible oil extracted from milk called cream in China. Huns are the earliest people who processed edible butter in the world.

Extended data:

Butter can be divided into raw butter (made directly from raw milk), superfine butter (only pasteurized raw milk or cream) and refined butter (partially frozen milk). In taste, it can also be divided into original flavor, semi-salt and salted butter.

Butter is divided into edible butter and lubricating butter, which is also called grease and is a kind of lubricating oil. This paper focuses on edible butter: called "Xiri Taosu" in Mongolian, it has unique and pure flavor and rich nutrition, and is a good product for herders to entertain guests. Butter can be extracted from milk skin, white oil or concentrated oil skin of fresh milk.

If fresh milk is used for extraction, the milk should be placed in a cylindrical container, and the end of a stick with a round plate at one end should be placed in milk or goat's milk, and it should be continuously stirred up and down. After stirring for hundreds of times, some white semi-solid will float on the milk, and the white oil will be fished out with a sieve, and it will become butter after extraction.

Reference Baidu Encyclopedia-Butter