Preheat an oven or toaster oven to 350 F.
If not already soft, gently warm peanut butter until easily stir-able.
Mix dry ingredients in a small bowl, then add wet to form a cookie dough.
If using a granulated sweetener, add an additional tablespoon of water.
Press into a cookie shape.
Bake 7 minutes, then let cool completely before handling, because the cookie firms up as it cools.
