Preheat oven to 325 degrees
Mix all dry ingredients and sugar in a big bowl
Stir in the two slightly beaten egg whites until all ingredients are combined
Spread mixture on a 16x9 shallow lipped cookie pan lined with parchment paper, pressing out mixture flat to the edges of the pan with back of a spatula
Spread any left over mixture in a second lined tray
Put trays in preheated oven and bake for 15 minutes or until mixture is set
Turn off oven and cool in oven until mixture hardens
When mixture is hard, break up into irregular shaped cookies
