Here's what you'll need:
2 cups whole wheat flour
1 tablespoon baking powder
1 cup natural peanut butter
1 cup skim milk (I used 2%)
Mix together the peanut butter and milk.
Add the baking powder and flour to the wet ingredients.
Knead and roll out on a lightly floured surface to 1/4 of an inch thick or so. Cut into your favorite shapes.
Place on a lightly greased baking sheet and bake for 20 minutes or until brown in a preheated 375 degree oven. Cool on rack and store in an airtight container.