These crisp skillet patties are one of the smartest ways to turn holiday leftovers into something that feels completely new. Cold mashed potatoes, a single egg, flour, and cheddar come together quickly, and the real magic happens in the pan, where the outside browns into a deeply savory crust while the center stays soft and tender. This is the kind of thrifty, fast recipe that earns a permanent place in the weekend rotation.
Serve them hot with eggs for breakfast, alongside roasted vegetables or a green salad for lunch, or next to ham, turkey, or sausages at dinner. They are also excellent with sour cream, applesauce, chives, or a little hot sauce on the side, depending on whether you want them to lean classic, rich, or a bit tangy.
4-Ingredient Leftover Mashed Potato Cakes
Servings: 4
Ingredients
3 cups cold leftover mashed potatoes
1 egg
1/2 cup all-purpose flour
1 cup shredded cheddar cheese
Directions
1. In a medium bowl, combine the cold mashed potatoes, egg, flour, and shredded cheddar. Stir until the mixture is evenly combined and thick enough to hold its shape.
2. Heat a lightly greased cast iron skillet over medium to medium-high heat. Scoop and shape the mixture into thick patties, then place them in the hot skillet.
3. Cook the patties without moving them until a deep golden crust forms on the bottom, about 4 minutes. Flip carefully with a spatula and cook the second side for about 4 minutes more, until crisp and heated through.
4. Transfer to plates and serve hot while the edges are crisp and the centers are still soft.
Variations & Tips
Use cold potatoes only: This recipe depends on thoroughly chilled mashed potatoes. Freshly made or warm potatoes are too loose and will spread in the skillet instead of holding neat patties.
Leave them alone in the pan: The best crust develops when the patties are not disturbed too early. If they stick when you try to flip them, give them another minute and let the browned surface release naturally.
Adjust the flour if needed: Leftover mashed potatoes vary a lot depending on how much butter, milk, or cream they contain. If the mixture seems very soft, add another spoonful of flour at a time until it is easy to shape.
Try another cheese: Sharp cheddar brings a nice savory bite, but Monterey Jack, Colby, or a little Parmesan also work well if that is what you have on hand.