What is Buttermilk?
Buttermilk is a dairy product, traditionally made from the remaining milk liquid after butter is churned. Today, commercial buttermilk is made by fermenting cow's milk with lactic acid and healthy bacteria. Buttermilk is slightly thicker than regular milk; similar in consistency to a very watery smoothy. It is white in color, has a distinctly sour taste and in the western world it is commonly used in baked goods to tenderize the crumb and add lightness to the texture.