Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  10      cups          all-purpose flour
   6 1/4  cups          sugar
   1      cup           cornstarch
   5      tablespoons   baking powder
   1      tablespoon    salt
   2 1/2  cups          vegetable shortening

Preparation:

In a large sifter, combine flour, sugar, cornstarch ,baking powder and salt. Sift, in batches, into a large bowl. Use a pastry blender to a heavy-duty mixer to blend in shortening until mixture resembles cornmeal in texture. Spoon into a 20-cup container with a tight-fitting lid. Seal container. Label with date and contents. Store in a cool, dry place. Use within 10 to 12 weeks. Makes about 17 cups of mix.