Combine all dry ingredients, then liquids separately, and stir together to combine thoroughly.
Spread the dough onto a non-stick cookie sheet and roll or press down to a ½ cm thickness.
Cut with a sharp knife into 16 squares, and bake at 350F for 20 minutes (for a softer and chewier cookie, bake for only 15 minutes).
Reinforce the cuts to separate the squares, and let cool. Enjoy each one with a glass of water and let the gut magic begin!