1 sm. potato, peel, cut into sm. cubes

Boil until tender; drain. Mash with 1/4 teaspoon butter, 1/2 teaspoon vanilla and work in powdered sugar until it is firm. Roll out. (On a powdered sugar surface) spread peanut butter on. Roll up like a jelly roll. Chill. Slice. This will keep for a long time.