Butter can not be made from dried milk.
Neither. Milk is an input for butter. One does not use milk on toast instead of butter which would make it a substitute. Nor does one always eat milk with butter which would make it a complement.
mix buttermilk and milk and u let it sit for a hour
milk
You can not make heavy cream from dry milk.
No, once you separate the cream and make butter from it, you can't go backwards to make milk again.
peanut butter, ice, milk
Peanut and butter--both of them are nouns. However, does peanut modify butter? There are nouns that are used as modifiers (door bell; bell of a door)Butter is churned cream--the fat of milk--or milk. Is peanut butter a churned milk or fat of milk with peanuts?The ingredient required to make peanut butter is just dry roasted peanuts. It does not require milk or milk fat. And so, peanut butter is not butter. Consequently, peanut does not modify (describe) butter in peanut butter. Thus, when combined, peanut and butter forms a new meaning; therefore, peanut butter is a compound word, an open compound word to be exact.
MILK
milk
Milk and a mixer
Butter is made from cow's milk. Pig's milk is only used to feed baby pigs.
Since butter is about 80% fat and whole milk is about 3.25% fat, you can get 0.039 liters of butter from 1 liter of milk. Most people make butter from cream, which is about 40% fat.