Irish Potato Candy

Step 1: Place potato cubes in a small sauce pan and cover with salted water. Bring to a boil, then reduce heat to medium-low and simmer until tender, about 15 minutes. Drain and cool.

Step 2: Mash potato in a large bowl until smooth.

Step 3: Stir 1 cup confectioners' sugar into mashed potato; mix well. Gradually stir remaining confectioners' sugar and milk to form a firm dough. Incorporate green food coloring at this point if using.

Step 4: Sprinkle work surface with confectioners' sugar, and roll dough into an 8x12-inch rectangle about 1/2 inch thick.

Step 5: Spread peanut butter evenly onto the dough.

Step 6: Tightly roll dough into a log, jelly roll-style, beginning at the wide end.

Step 7: Wrap log in plastic wrap and chill in refrigerator until the candy sets up, about 1 hour.

Step 8: Cut into 1/4-inch slices.