Buttermilk

Buttermilk is a low-fat dairy product that is a by-product of butter making. It has a mildly tangy flavor due to the presence of lactic acid and probiotic bacteria. In the kitchen, buttermilk is widely used for making pancakes, waffles, muffins, breads, and other baked goods, where it helps leaven and tenderize the dough. It is also traditionally enjoyed as a refreshing drink. It is relatively low in fat but rich in protein, calcium, and B vitamins. When used as a meat marinade, especially for chicken, it helps tenderize the fibers and adds great flavor.