Peanut Butter Special Plug small end of Kong. Heat 1/3 cup of peanut butter in the microwave until runny. Pour into Kong and let cool. Throw in a few kibbles for an extra workout. This recipe should be used as a special reward or important distraction! Use less peanut butter or a low fat brand if you are watching the pup’s weight, or use recipes 1 or 2 instead!