9 c. sifted all-purpose flour 1/3 c. baking powder 1 Tbsp. salt 2 tsp. cream of tartar 4 Tbsp. sugar 1 c. nonfat dry milk 2 c. shortening which does not require refrigeration Sift together 3 times the flour, baking powder, salt, cream of tartar, sugar and dry milk. Cut in shortening with pastry blender or 2 knives until mixture looks like coarse corn meal. Store in covered container at room temperature. Makes 13 cups mix. Note: To measure the Master Mix, pile it lightly into cup and level off with spatula.