If baking powder and cream of tartar appear lumpy, sift through a fine mesh sieve before using.
Prepare as above, except substitute 1-1/4 cups buttermilk or sour milk for the 1 cup milk in the rolled biscuits and 1-1/2 cups buttermilk or sour milk for the 1-1/4 cups milk in the drop biscuits.
Drop Biscuits Supreme:
Prepare as above through step 1, except increase milk to 1-1/4 cups. Using a large spoon, drop dough into 12 mounds onto a greased baking sheet. Bake as directed above. Makes 12 biscuits.