What is butter made of?

Cream actually

Globular Martian, no, cream is skimmed off the top of milk. Cream can then be made into butter. cheese can be made from milk, whether the cream has been removed or mixed in. Whey is the liquid, often with much protein, that results from adding rennet. the rennet produces curds and whey. The curds are turned into cheese .

Mmmmm… Yak butter! 😋

Lisa, I agree with you. It's the fat in the milk that has been churned to form a solid. The remaining fluid is called whey.