Whisk together all of the dry ingredients. Place half of the dry mixture and half of the shortening into a food process. Process until combined. Repeat for second half of ingredients. Combine both batches in a big bowl and work with your hands, breaking up any larger pieces.
Store in a covered container and use within a month. To measure, use the same scoop and level method you would use with regular flour.
Pancakes
Smply combine 2 cups master mix with 2 eggs and a cup of milk.
Biscuits
Combine 2 1/4 cups master mix and 2/3 cup milk.
Combine, roll, cut, bake at 450 F for 8-10 minutes. Use this mix for any recipe calling for Bisquick.