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Air fryer gratin with some served and a spoon in the casserole dish.

Air Fryer Potato Gratin

Cheesy and creamy, this air fryer potato gratin recipe is so much quicker than oven baking. A delicious potato side that can be made in advance.
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Course: Side Dish
Cuisine: American
Prep Time: 10 minutes
Cook Time: 45 minutes
Total Time: 55 minutes
Servings: 6 servings
Calories: 366kcal
Author: Betty Davies

Equipment

Ingredients

  • 1 tablespoon oil
  • 1 tablespoon butter
  • 1 small onion (finely diced)
  • 4 garlic cloves (minced)
  • cups heavy or whipping cream (35%) (350ml)
  • ¼ teaspoon ground nutmeg
  • ¼ teaspoon salt
  • ¼ teaspoon black pepper
  • ¼ cup freshly grated parmesan (4 tablespoons)
  • 3 large potatoes (Yukon Gold or Russet)

For the gratin topping

Instructions

  • Heat the oil and butter in a small pot.
  • Add in the finely diced onions and cook til soft. Stir in the minced garlic and cook for an extra couple of minutes.
  • Add in the cream, nutmeg, salt and pepper. Bring to a low simmer and keep on the heat for 5 minutes to let the cream thicken.
  • Take off of the heat and stir in the parmesan. Set to one side.
  • Preheat the air fryer to 360F.
  • Peel the potatoes and slice finely with a knife or mandolin.
  • Layer the sliced potatoes in a small casserole dish and pour the cream mixture over the top to coat. Wrap the dish securely in foil.
  • Cook in the air fryer for 30 to 35 minutes until the potato slices are tender. Take care when removing the foil as there will be hot steam. Depending on how thickly you sliced the potatoes the timings may vary.
  • Once the potatoes are tender, remove from the air fryer and pre heat the broiler.
  • Sprinkle the remaining parmesan cheese and panko breadcrumbs on top and broil til golden brown.

Notes

  • Cut the potatoes as thinly as you can. Use a sharp knife or a madoline if you have one.
  • Cover the baking dish tightly in foil when you place it it the air fryer. Wrap a large piece of foil under the baking dish to keep it secure, loose foil can be sucked up by the air fryer fan.
  • Take care when removing the foil from the dish, it will be piping hot and steam will escape as you open it.
  • Use a fork to check that the potatoes are tender when you’ve baked them. If cut thickly, they may require extra time in the air fryer.
  • The gratin will brown quickly under the broiler, so keep your eye on it so that it doesn't burn.
  • I used my 6quart basket air fryer and my 7.5 inch Staub casserole dish to make this recipe.

Nutrition

Calories: 366kcal | Carbohydrates: 23g | Protein: 6g | Fat: 28g | Saturated Fat: 16g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 9g | Trans Fat: 1g | Cholesterol: 92mg | Sodium: 284mg | Potassium: 456mg | Fiber: 2g | Sugar: 2g | Vitamin A: 990IU | Vitamin C: 19mg | Calcium: 144mg | Iron: 1mg