To what regulations is creamery butter subject?

Answer:
Under federal regulations, butter sold in the United States is made exclusively from milk or cream, or both, and must contain at least 80 percent milkfat by weight. Coloring or salt may be added
First answer by Ency. of US Industries. Last edit by Ency. of US Industries. Contributor trust: 18 [recommend contributor recommended]. Question popularity: 1 [recommend question].