Mix flour, baking powder, salt, cream of tartar, baking soda, nonfat milk, and shortening together in large bowl (if you have a large mixer it is ideal to use for blending this mix but it can also be done quite adequately using a pastry blender to cut in shortening). Add shortening about a half cup at a time mixing well after each addition. Mixture will be mealy when mixed adequately. Put in air-tight container and store either in refrigerator or at room temperature. Use within about 3 months.
Mix 2 cups of Baking Mix with 1/2 cup water. Bake at 450 degrees F for 8 to 10 minutes.
Mix 2 cups of Baking Mix with 2 Tablespoons sugar, 1 beaten egg and 2/3 cup milk. Bake at 400 degrees F for 15 minutes.
Mix 2 cups of baking mix with 1 beaten egg and 1-1/3 cup milk.
Mix 2 cups of Baking Mix with 1 beaten egg, 2 Tablespoons oil, and 1-1/3 cup milk.
Can also be used cup for cup in any Bisquick recipe.