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Crispy Leftover Mashed Potato Cakes

A stack of four golden brown, crispy mashed potato cakes resting on a white plate near a window.

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Use your leftover mashed potatoes to make these easy, crispy potato cakes. They are soft inside and golden brown outside, perfect for a quick side dish or snack.

Ingredients

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  • 4 cups cold mashed potatoes
  • 1 large egg, lightly beaten
  • 1/4 cup all-purpose flour
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/2 cup shredded cheddar cheese (optional)
  • 1/4 cup chopped chives or green onion (optional)
  • 1/4 cup vegetable oil, for frying

Instructions

  1. Place the cold mashed potatoes in a medium bowl.
  2. Add the beaten egg, flour, salt, and pepper to the potatoes. If you are using cheese or chives, add them now.
  3. Mix the ingredients gently until just combined. Do not overmix. The mixture should hold its shape when pressed.
  4. Heat the vegetable oil in a large skillet over medium heat until the oil shimmers.
  5. Scoop about 1/4 cup of the potato mixture and form it into a patty, about 1/2 inch thick.
  6. Carefully place the patties into the hot oil, ensuring you do not overcrowd the pan. Work in batches if necessary.
  7. Cook the potato cakes for 4 to 5 minutes per side, until they are golden brown and crisp.
  8. Remove the cooked cakes from the skillet and place them on a plate lined with paper towels to drain excess oil.
  9. Serve the mashed potato cakes immediately.

Notes

  • For extra crispiness, you can dredge the formed patties lightly in a small amount of flour or panko breadcrumbs before frying.
  • If your mashed potatoes are very soft, chill the mixture for 15 minutes before forming the cakes.
  • These cakes reheat well in an oven or air fryer to restore crispness.

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