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
No, once you separate the cream and make butter from it, you can't go backwards to make milk again.
peanut butter, ice, milk
No, pigs do not make butter. Butter is made from churning cream, typically from cows. Pigs are mammals that do not produce milk with a high enough fat content for making butter.
milk
MILK
Milk and a mixer
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.
Food........