Mix 9 cups all-purpose flour, * 1/3 cup baking powder, 1/4 cup sugar, 1 tablespoon salt and 1 teaspoon baking soda. Cut in 2 cups shortening completely until particles are size of coarse cornmeal. Refrigerate in airtight container up to 1 month. 13 cup's mix. *Do not use self-rising flour in this recipe.