Potato-Sour Cream Biscuits are tender, light little dinner biscuits. Being savory, they make a nice addition to soup. These were a regular part of our menu until we started limiting cow’s milk dairy. These are another that I don’t know if they keep well because we’ve never had any leftover; they are delicious. We’ve never regularly kept buttermilk in the house, but we used to keep powdered buttermilk on hand for recipes like this one.