Preheat oven to 375F.
Mix dry ingredients except sugar in a bowl. Mix liquid ingredients plus sugar in another bowl, stir until sugar dissolves. Add liquid ingredients to dry ingredients, just until dough holds together and is workable. (you might use less than all liquid, or have to add a bit more water).
Roll dough out to 1/4 inch thickness (dust it lightly with flour so it doesn't stick to rolling pin). You can also just press the ball flat with your hand.
Cut into cookies.
Place on baking sheet. Bake for 12-14 minutes. Let cool. Enjoy & start again!
You can make many more kinds of cookies with this recipe, including salty ones. Experiment with flavors, herbs, etc.
Notes: * you can also make your own oat flour by grinding rolled oats in a food processor or blender to cornmeal consistency.
** if substituting liquid sweetener, adjust dry/liquid ratio accordingly