Homemade dog biscuits using spent grains from homebrewing. 4 cups of grain 2 cups AP flour 1 cup peanut butter 2 eggs Preheat oven to 350F. Combine all ingredients in mixer. Roll out as if making cookies (or a pie crust). Use a cookie cutter to form shapes. Bake at 350F for 30 minutes. Drop temp down to 225F and bake for an additional 2 hours (to dry out the cookies). Let cool and they are good to go.