Boil potato in jacket until fork tender. Peel potato and mash in
large bowl. Add powdered sugar 1 cup at a time until a firm dough.
Roll between waxed paper to 1/4" thick. Remove top layer of waxed
paper. Spread peanut butter on potato dough. Roll jelly roll style.
Chill until well set. Slice into pretty pinwheel candies.
