This is the best biscuit recipe I've ever made. My family loves these. I have frequently substituted 1 Tbsp vinergar and 1 cup milk for the buttermilk with perfect results. The only other change I make is to cut them into 12 square biscuits rather than cut them with a biscuit cutter. It's quicker and saves re-rolling the dough (which makes it tough). This recipe if from my very favorite cookbook "Texas Home Cooking". Posted here for safekeeping.