1 sm. potato
powdered sugar
peanut butter

Boil a small unpeeled potato until soft. Peel and mash potato in a mixing bowl. Add powdered sugar a little at time and mix. Keep doing this until a dough forms. Roll out dough on waxed paper until about 1/4 inch thick. Spread peanut butter on dough. Roll into a log. Cut into 1/4 inch thick slices. Cover with plastic wrap and chill in refrigerator