10 c  Flour
1 2/3 c  Instant nonfat dry milk
1/3 c  Baking powder
2 1/2 ts Salt
1 2/3 c  Shortening

Mix dry ingredients thoroughly in a large container. Cut in shortening
until fine crumbs are obtained. Store tightly covered, in refrigerator.
Use within 3 months.

example recipe: Biscuits 3 CUPS biscuit mix
2/3 CUP water Preheat oven to 425 F. Stir most of the water with the
mix. Add more water to make a soft dough that is not too sticky to knead.
Knead dough 15 times on a lightly floured surface. Pat or roll dough into a
square about 7 x 7 inches. Cut into 16 pieces and place on ungreased baking
sheet. Bake until lightly browned, about 12 minutes.