Buttermilk

Traditionally, buttermilk is the liquid left over after the making of butter. Today, buttermilk is commercially made by adding a special bacteria to low-fat or non-fat milk, which give it a thicker texture and tangy taste. Sometimes you might find tiny flecks of butter, which are added today to simulate the effect of the real thing. Contrary to what the name might imply, buttermilk is low in fat.