The Best Leftover Mashed Potato Recipes (12 to Try)

Reheated mash is rarely as good as it was on the day. It turns stiff in the fridge and gluey in the microwave, and the bowl sits there until it is thrown away. These leftover mashed potato recipes give that cold mash a new job: potato cakes, a cottage pie topping, gnocchi, rolls, soup and a stuffed flatbread.

Most start with 2 cups of mash, about what is left after a dinner for six. Cold mash from the fridge works best because it holds its shape. The table shows the time and protein for each, so you can match one to tonight.

At a Glance

1. Crispy Mashed Potato Cakes

The fastest fix for leftover mash. An egg and a little flour bind it, cheddar and green onion give it flavour, and a hot pan does the rest. They are crisp outside, soft inside and ready in about 30 minutes. Chill the shaped cakes for 10 minutes so they hold together in the pan.

Ingredients

• 2 cups cold mashed potatoes
• 1 large egg
• 1/3 cup all-purpose flour (40 g), plus more for dusting
• 1/2 cup shredded cheddar (50 g)
• 2 green onions, sliced
• 1/4 teaspoon kosher salt
• 3 tablespoons neutral oil

Steps

1. Mix the mash, egg, flour, cheddar, green onions and salt until even.
2. Shape into 8 cakes about 1/2 inch thick, dust lightly with flour and chill for 10 minutes.
3. Heat the oil in a large skillet over medium heat and fry the cakes for 3 to 4 minutes per side until deep golden.
4. Drain on a paper towel and serve hot.

Time: 30 minutes · Protein: 8 g per serving · Serves: 4

2. Cheesy Mashed Potato Waffles

A waffle iron turns leftover mash into something crisp in every pocket. Mozzarella melts and browns against the plates, and a fried egg on top makes it a full brunch.

Grease the iron well; potato sticks more than batter.

Ingredients

• 2 cups cold mashed potatoes
• 2 large eggs
• 1/2 cup all-purpose flour (60 g)
• 1/2 teaspoon baking powder
• 1/4 cup milk (60 ml)
• 1/2 cup shredded mozzarella (50 g)
• 1/4 cup grated parmesan (20 g)
• 2 tablespoons chopped chives
• Oil spray, for the iron
• 4 large eggs, fried, to serve

Steps

1. Heat the waffle iron to medium-high and spray it well.
2. Whisk the mash, eggs, milk, flour and baking powder, then fold in both cheeses and the chives.
3. Spread about 3/4 cup into the iron and cook for 5 to 7 minutes until deep golden and crisp.
4. Keep warm on a rack in a 200°F (95°C) oven while you cook the rest, then fry the eggs and set one on each pair of waffles.

Time: 35 minutes · Protein: 12 g per serving · Serves: 4

3. Cottage Pie With Leftover Mash

Leftover mash is the hardest part of a cottage pie, already done. Ground beef simmers with carrots, onion, peas and tomato paste in a thick gravy, then the mash goes on top and bakes until the ridges brown. Made with ground lamb, the same dish is a shepherd’s pie.

Ingredients

• 1 lb ground beef (450 g)
• 1 onion, diced
• 2 carrots, diced
• 2 tablespoons tomato paste
• 1 tablespoon all-purpose flour
• 1 cup beef stock (240 ml)
• 1/4 teaspoon kosher salt
• 1 teaspoon dried thyme
• 1 cup frozen peas
• 3 cups leftover mashed potatoes
• 1/2 cup shredded cheddar (50 g)

Steps

1. Heat the oven to 400°F (200°C).
2. Brown the beef with the onion and carrots in a large skillet over medium-high heat for 8 minutes until no pink remains (160°F / 71°C).
3. Stir in the tomato paste and flour for 1 minute, then add the stock, salt and thyme and simmer for 10 minutes until thick. Stir in the peas.
4. Spread into an 8-inch square dish, top with the mash, rough it up with a fork and scatter the cheddar.
5. Bake for 20 to 25 minutes until bubbling at the edges and golden on top.

Time: 1 hour · Protein: 30 g per serving · Serves: 4

Budget swap: Use 1/2 lb beef and 1 can of drained brown lentils in place of the full pound. It stretches the pie to 6 servings, and the lentils soak up the gravy so no one notices.

4. Parmesan Mashed Potato Puffs

Bite-size, crisp-topped and soft inside, these are what to make when kids push leftovers away. A mini muffin tin shapes them, and parmesan and sour cream add flavour.

Grease the tin well and let them cool 5 minutes before lifting out.

Ingredients

• 2 cups cold mashed potatoes
• 1 large egg
• 1/2 cup grated parmesan (45 g)
• 2 tablespoons sour cream
• 1/4 teaspoon garlic powder
• 2 tablespoons chopped parsley
• 2 tablespoons unsalted butter, melted, for the tin

Steps

1. Heat the oven to 400°F (200°C) and brush a 24-cup mini muffin tin with butter.
2. Mix the mash, egg, parmesan, sour cream, garlic powder and parsley.
3. Fill each cup to the top and smooth with a wet finger.
4. Bake for 20 to 25 minutes until the tops are golden and the edges pull away. Cool for 5 minutes before lifting out.

Time: 35 minutes · Protein: 5 g per serving · Serves: 6

5. Potato Soup From Leftover Mash

Leftover mash is already the base of a good potato soup, so this takes 20 minutes and one pot. Onion and garlic go in first, then the mash, stock and milk, and a quick blend makes it smooth. Taste before salting; leftover mash is usually already seasoned.

Ingredients

• 2 tablespoons unsalted butter
• 1 onion, diced
• 2 garlic cloves, minced
• 3 cups leftover mashed potatoes
• 3 cups chicken stock (720 ml)
• 1 cup milk (240 ml)
• 1/2 teaspoon dried thyme
• 1/4 teaspoon black pepper
• 1/2 cup shredded cheddar (50 g) and 2 sliced green onions, to top

Steps

1. Melt the butter in a pot over medium heat and cook the onion for 5 minutes until soft. Add the garlic for 1 minute.
2. Whisk in the mash, stock, milk, thyme and pepper and simmer for 10 minutes, stirring often.
3. Blend part of the soup with a hand blender for a smooth but thick texture.
4. Ladle into bowls and top with cheddar and green onions.

Time: 21 minutes · Protein: 9 g per serving · Serves: 4

6. Leftover Mash Gnocchi With Brown Butter

Plain leftover mash makes soft, light gnocchi with a modest amount of flour. Roll the dough into ropes, cut, boil until they float, then toss in brown butter with sage.

Mash with lots of cream or cheese needs a little extra flour, so add it a spoon at a time.

Ingredients

• 2 cups cold plain mashed potatoes
• 1 large egg yolk
• 1 1/4 cups all-purpose flour (155 g), plus more for dusting
• 1/2 teaspoon kosher salt
• 4 tablespoons unsalted butter
• 8 sage leaves
• 1/4 cup grated parmesan (20 g)

Steps

1. Mix the mash, egg yolk, flour and salt into a soft dough; knead for 1 minute only.
2. Roll into 4 ropes 3/4 inch thick, cut into 1-inch pieces and press each with a fork.
3. Boil in well-salted water for 2 to 3 minutes until they float, then lift out with a slotted spoon.
4. Cook the butter and sage in a large skillet over medium heat for 3 to 4 minutes until nutty and brown. Toss in the gnocchi and top with parmesan.

Time: 35 minutes · Protein: 9 g per serving · Serves: 4

7. Mashed Potato Dinner Rolls

A cup of mashed potato makes rolls that stay soft for days, because the starch holds moisture in the dough. These are fluffy, lightly sweet and rich with butter. Warm the milk only to about 110°F; hotter milk can kill the yeast.

Ingredients

• 1 cup leftover mashed potatoes
• 2/3 cup warm milk (150 ml)
• 2 1/4 teaspoons instant yeast (1 packet)
• 3 tablespoons sugar (40 g)
• 1 large egg
• 4 tablespoons unsalted butter, softened, plus 1 tablespoon melted for the tops
• 1 teaspoon kosher salt
• 4 cups all-purpose flour (500 g)

Steps

1. Mix the mash, milk, yeast, sugar, egg, softened butter and salt, then add 3 1/2 cups of the flour, adding the last 1/2 cup only if the dough still sticks to the bowl, and knead for 6 to 8 minutes until smooth and slightly tacky.
2. Cover and let rise in a warm spot for 1 hour until doubled.
3. Shape into 16 balls, set them in a greased 9 x 13 inch pan and rise for 30 to 40 minutes until puffy.
4. Bake at 375°F (190°C) for 18 to 20 minutes until golden and 190°F in the centre. Brush with the melted butter.

Time: 2 hours 25 minutes · Protein: 5 g per serving · Serves: 16 rolls

Storage: The rolls keep 2 days at room temperature in a sealed bag. Freeze them for 3 months, then wrap in foil and warm at 300°F for 8 to 10 minutes.

8. Air Fryer Cheddar Potato Balls

Each ball hides a cube of cheddar that melts while the panko shell crisps. The air fryer gets them golden with a spray of oil, no deep pot needed.

Chill the shaped balls for 20 minutes first so they keep their shape in the basket.

Ingredients

• 2 cups cold mashed potatoes
• 16 cubes cheddar (1/2 inch each, about 2 oz)
• 2 tablespoons all-purpose flour (15 g)
• 1 large egg, beaten
• 3/4 cup panko breadcrumbs (45 g)
• 1/4 teaspoon smoked paprika
• Oil spray

Steps

1. Scoop 2 tablespoons of mash, press a cheddar cube in the centre and roll into a ball. Repeat to make 16, then chill for 20 minutes.
2. Roll each ball in flour, then egg, then panko mixed with the paprika.
3. Spray with oil and air fry at 400°F (200°C) for 8 to 10 minutes, shaking once, until golden.
4. Rest 2 minutes before eating; the cheese inside is very hot.

Time: 40 minutes · Protein: 9 g per serving · Serves: 4

9. Turkey Mashed Potato Croquettes

Two leftovers in one bite: cold mash and chopped roast turkey, with sage and green onion, rolled in panko and shallow-fried until crisp. Cranberry sauce is the obvious dip. Shredded chicken works the same way any other week.

Ingredients

• 2 cups cold mashed potatoes
• 1 cup cooked turkey (140 g), finely chopped
• 1 green onion, finely chopped
• 1/2 teaspoon dried sage
• 2 large eggs, divided
• 1/2 cup all-purpose flour (60 g)
• 1 cup panko breadcrumbs (60 g)
• Neutral oil, for shallow frying

Steps

1. Mix the mash, turkey, green onion, sage and 1 egg, then shape into 12 small logs and chill for 15 minutes.
2. Roll each in flour, then the second egg, beaten, then panko.
3. Heat 1/2 inch of oil to 350°F (175°C) and fry in batches for 2 to 3 minutes per side until deep golden and 165°F in the centre.
4. Drain on a rack and serve with cranberry sauce.

Time: 40 minutes · Protein: 18 g per serving · Serves: 4

10. Aloo Paratha With Leftover Mash

Aloo paratha is a whole wheat flatbread stuffed with spiced potato, a breakfast favourite across Pakistan and North India. The traditional filling uses freshly boiled potatoes, but plain leftover mash works well if it is not too wet.

Serve with plain yogurt and a cup of tea.

Ingredients

• 2 cups whole wheat flour (atta) (240 g)
• 1/2 teaspoon salt, plus 1/4 teaspoon for the filling
• 3/4 cup water (180 ml), about
• 1 1/2 cups cold plain mashed potatoes
• 1 green chili, finely chopped
• 2 tablespoons chopped cilantro
• 1/2 teaspoon roasted ground cumin
• 1/4 teaspoon red chili powder
• 3 tablespoons ghee or neutral oil

Steps

1. Knead the flour, salt and water into a soft dough for 3 minutes, then rest it covered for 15 minutes.
2. Mix the mash with the green chili, cilantro, cumin, chili powder and salt.
3. Divide the dough into 4 balls, flatten each, put a quarter of the filling in the centre, pinch closed and roll gently into a 7-inch circle.
4. Cook on a hot dry skillet over medium-high heat for 1 minute per side, then brush with ghee and cook 1 to 2 minutes more per side until golden brown spots appear.

Time: 41 minutes · Protein: 9 g per serving · Serves: 4

11. Mashed Potato Breakfast Nests

Mounds of mash with a well in the middle bake until the rims crisp, then each one gets an egg. It feeds six at once with one sheet pan, so it suits a holiday morning. Bake the empty nests first so the potato crisps before the egg goes in.

Ingredients

• 4 cups cold mashed potatoes
• 1/4 cup grated parmesan (20 g)
• 6 large eggs
• 1 tablespoon olive oil
• 1/4 teaspoon smoked paprika
• 1/4 teaspoon kosher salt
• 1 tablespoon chopped parsley

Steps

1. Heat the oven to 425°F (220°C) and line a sheet pan with parchment.
2. Mix the mash with the parmesan and shape into 6 rings with walls about 1/2 inch thick around a deep well. Brush with oil.
3. Bake for 15 minutes until the edges begin to crisp.
4. Crack each egg into a cup, tip off about 1 tablespoon of the white, slide it into a well and bake for 10 to 12 minutes until the whites are set and the yolks still soft.
5. Season with paprika, salt and parsley.

Time: 37 minutes · Protein: 9 g per serving · Serves: 6

12. Loaded Baked Mash Casserole

Stir cream cheese and sour cream into leftover mash, bake it under cheddar, and it comes out tasting better than the first time. Fried onions and green onion on top make it a loaded side for any potluck.

Warm the mash slightly before mixing so the cream cheese blends in.

Ingredients

• 4 cups leftover mashed potatoes
• 4 oz cream cheese (115 g), softened
• 1/2 cup sour cream
• 1/4 teaspoon garlic powder
• 1 cup shredded cheddar (100 g), divided
• 1/2 cup store-bought fried onions
• 2 green onions, sliced

Steps

1. Heat the oven to 350°F (175°C).
2. Beat the mash, cream cheese, sour cream, garlic powder and half the cheddar until smooth.
3. Spread in a buttered 2-quart dish and top with the rest of the cheddar.
4. Bake for 25 to 30 minutes until hot in the centre (165°F / 74°C) and bubbling. Scatter the fried onions and green onions on top.

Time: 40 minutes · Protein: 10 g per serving · Serves: 6

Before You Cook

How long does leftover mashed potato keep?

Cooked mash keeps 3 to 4 days in a sealed container in the fridge, because after that bacteria can grow even when it looks fine. Cool it within 2 hours of dinner. For longer, freeze it in 2-cup bags for 2 months and use it in the soup, cottage pie or casserole.

Why do potato cakes fall apart in the pan?

The mash is too warm or too wet. Warm mash is soft and loose, and creamy mash carries extra liquid. Chill it first, add flour 1 tablespoon at a time until it holds a shape, and wait until the oil is hot and the crust has set before flipping.

Does buttery, cheesy mash still work?

For the cakes, puffs, soup and casserole, yes, and the extra butter adds flavour. For the gnocchi and the paratha, plain mash is better, because extra fat and cream make the dough soft and sticky. Add a little more flour, a spoon at a time, if it is all you have.

Make-Ahead Tips

The cottage pie, the puffs, the potato balls and the croquettes all freeze well. Shape or assemble them, freeze them for up to 2 months (3 for the cottage pie), and bake or air fry from frozen with a few extra minutes. The casserole and nests are best assembled the night before and baked in the morning, and the soup keeps 4 days in the fridge.

Anything crisp here reheats in the oven or air fryer, never the microwave. A 400°F oven for 8 to 10 minutes brings back the crust on cakes, puffs and croquettes, while the microwave turns them soft and steamy in seconds.