Garlic Parmesan Air Fryer Mashed Potato Cakes

Leftover mashed potatoes never tasted so good! These Garlic Parmesan Air Fryer Mashed Potato Cakes are crispy on the outside, soft and cheesy inside, and packed with garlicky, savory flavor. They’re the perfect way to give your leftover mash a delicious second life — or a tasty reason to make a fresh batch just for these cakes!

Why I Love This Recipe

I love this recipe because it’s budget-friendly, easy, and always a crowd-pleaser. These mashed potato cakes turn simple ingredients into golden, cheesy bites that make a great snack, appetizer, or side dish. The air fryer makes them wonderfully crispy without the need for deep frying or lots of oil — so they’re lighter and less messy to make.

Another thing I love is how versatile they are — you can add herbs, swap in different cheeses, or mix in cooked veggies or bits of bacon. They’re amazing for using up holiday leftovers or turning plain mashed potatoes into something everyone gets excited about.

Ingredients Needed

You’ll need just a few simple ingredients to make these crispy mashed potato cakes:

2 cups cold mashed potatoes (leftover or freshly made and cooled)
1 cup shredded Parmesan cheese (or a blend of Parmesan and mozzarella)
1 egg
2 cloves garlic, minced (or 1 teaspoon garlic powder)
¼ cup all-purpose flour or breadcrumbs (plus extra for coating if you like)
2 tablespoons chopped green onions or fresh parsley (optional)
Salt and black pepper, to taste
Olive oil spray or a little melted butter (for brushing)

How to Cook Garlic Parmesan Mashed Potato Cakes in the Air Fryer

Mix the Batter: In a large bowl, combine the mashed potatoes, shredded Parmesan, egg, minced garlic, flour (or breadcrumbs), green onions if using, and a good pinch of salt and pepper. Stir until the mixture holds together well. If it feels too wet, add a little more flour or breadcrumbs.
Form the Cakes: With clean hands, shape the mixture into small patties, about ½ inch thick. For extra crunch, you can lightly coat each patty in breadcrumbs.
Preheat the Air Fryer: Preheat your air fryer to 375°F (190°C) for a few minutes.
Cook the Cakes: Lightly spray or brush both sides of the potato cakes with olive oil or melted butter. Place them in a single layer in the air fryer basket (you may need to work in batches).
Air Fry: Cook for 8–10 minutes, flip them carefully, then cook another 5–7 minutes or until golden brown and crispy on both sides.
Serve: Remove carefully and serve warm with a sprinkle of extra Parmesan, fresh herbs, or your favorite dipping sauce — sour cream, ranch, or garlic aioli are all delicious!

Pro Tip: If you want them extra cheesy, press a little more shredded cheese into the top before air frying!