Cut the potatoes into chunks and mash while adding vanilla.
Coconut a little at a time and add powdered sugar until mixture is thick and completely covered.
Two equal balls, wrap in cling wrap candy form, and refrigerate for an hour.
Sprinkle powdered sugar on a sheet of waxed paper and candy at a time out, a ball to roll, as an 8-inch square.
Note: a cup of water near room temperature where you are going to roll out the candy set. With a little practice you will find that you repair cracks, pieces can be added back in, they roll out the dough on your fingers wet and rub them.
Spread each square with peanut butter, covering entire surface.
Candy roll into a log like a jelly roll. Wrap each roll in waxed paper and cut to 2 hours or refrigerate until firm enough.
1 / 2 inch slices and serve slice the logs. Store leftovers in an airtight container in the refrigerator.
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