Buttermilk, traditionally, was the liquid left over after butter was churned from cream. These days it is commonly made commercially; a bacterial culture being added to skimmed or whole milk.

Read more: 12 Popular Grocery Store Butter Brands, Ranked Buttermilk is a cultured milk product commonly used in baking, cooking, drinks, and desserts. It's thicker than milk and cream ...

Hint: It's not lemon juice and milk. Dozens of iconic Southern recipes call for buttermilk, the incomparable cultured milk that lightens, tenderizes, marinates, flavors, and performs other works ...