Biscuit Mix - cooking recipe

Ingredients

4 3/4 cups cake-and-pastry flour (or 4 1/4 all purpose flour)
2 tablespoons baking powder
1 teaspoon baking soda
1 teaspoon cream of tartar
1 teaspoon salt
3/4 cup instant milk
1 1/8 cups vegetable shortening

Preparation

Sift together flour, baking powder, baking soda, cream of tartar and salt.
Place in a food processor fitted with metal blade.
Add skim milk powder and process a few seconds to mix ingredients.
Cut shortening into chunks and add to dry ingredients.
Process until mixture resembles coarse crumbs and margarine is distributed evenly.
Do not over process.
Spoon into an 8 cup container and seal tightly.
Store in the refrigerator.