I haven't made this in a while, but a friend just asked me for the recipe. I thought I would go ahead and post it. It comes from the King Arthur 200th Anniversry Cookbook.
6 cups all-purpose flour
3 cups whole wheat flour
1/2 wheat germ or bran (optional)
1 1/2 cups non-fat dry milk or 1 1/2 cups dry buttermilk powder
1 Tablespoon salt
1/4 to 1/2 cup sugar, white or brown
1/4 baking powder
1 cup vegetable shortening
In a large bowl, combine flours, wheat germ or bran, dry milk, salt, sugar, and baking powder, and mix well. Cut in the shortening until it is evenly distributed. (It is important to use shortening instead of butter as it is stable at room temperature)
To store this mix, place it in a large, airtight container, or put it up in premeasured (don't pack it), 2-cup portions. It will make approximately seven.
To Use Your Pancake Mix
Each 2-cup batch of mix makes about a dozen 12" pancakes
1 egg, slightly beaten
1 to 1 1/4 cups warm water (depending on how thick you like your pancakes)
2 cups Pancake Mix, not packed
Combine the egg and water in a bowl. Stir in the mix until it is just moistened. Cook pancakes as you normally would.