You can buy powdered, dehydrated buttermilk and return it to a liquid ... typically exclude dairy products, grains, and legumes. These substitutes are also vegan. The recipes below make 1 cup ...

It also includes buttermilk powder. Total Milk powder Whole milk powder Milk powder with 1.5 percent or more fat. Skimmed-milk powder Milk powder with less than 1.5 percent fat. Concentrated milk ...