Old-Fashioned Potato Candy

Born during the Great Depression, Old-Fashioned Potato Candy is a classic Appalachian retro confection that transforms a single leftover boiled potato into a silky, sweet, fudge-like roll swirled with rich peanut butter. It requires no baking, no candy thermometer, and just 4 simple ingredients.

The 4 Ingredients

1. Plain Cooked Potato (⅓ cup, mashed thoroughly) – A plain Russet or Yukon Gold potato, peeled, boiled, and mashed smooth with no butter, milk, or salt.
2. Powdered Sugar (3 to 4 cups) – Added cup by cup until the potato starch binds the sugar into a workable, pliable dough.
3. Creamy Peanut Butter (½ cup) – Spread over the rolled-out dough to form the signature inner swirl.
4. Pure Vanilla Extract (1 teaspoon) – Adds a warm, aromatic flavor note to balance the sweetness.

Step-by-Step Instructions

1. Prep the Potato: Ensure your plain boiled potato piece is warm or at room temperature. In a mixing bowl, mash it thoroughly with a fork or potato ricer until completely free of lumps.
2. Build the Dough: Stir the vanilla extract into the mashed potato. Gradually add the powdered sugar, one cup at a time, mixing well after each addition. The mixture will initially turn runny as the sugar reacts with the potato’s starches, but keep adding powdered sugar until a stiff, smooth dough forms (similar to playdough).
3. Roll it Out: Dust a large piece of parchment or wax paper generously with powdered sugar. Place the potato dough in the center, dust the top, and roll it out into a rectangle about ¼-inch thick (roughly 9×12 inches).
4. Spread the Peanut Butter: Spread the creamy peanut butter in an even layer across the dough, leaving a ½-inch border clear along the edges.
5. Roll into a Log: Starting from one of the long edges, use the parchment paper to help tightly roll the dough up jelly-roll style into a log. Wrap the log tightly in parchment paper.
6. Chill & Slice: Chill in the refrigerator for at least 1 to 2 hours until firm. Use a sharp knife to slice into ¼-inch pinwheels. Keep refrigerated until ready to serve!

Pro Tips & Shortcuts

• No Dairy or Salt in the Potato: Use a plain boiled potato—never use leftover mashed potatoes made with butter, garlic, or milk, as the oils will prevent the dough from setting.
• Keep It Cool: Potato candy softens quickly at room temperature due to the high sugar content. Store the sliced pinwheels in an airtight container lined with wax paper in the fridge.