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Four white ramekins filled with baked oat and apple crumble are arranged on brown parchment paper, with green apple slices placed around them.

Air Fryer Apple Crisp with Cinnamon Oat Topping

Author: Jessica Haggard
Air fryer apple crisp brings the classic cinnamon apples and crumbly oat topping down to four small ramekins. Lemon zest brightens the Granny Smith filling, and a spoonful of cornstarch turns the juices into sauce instead of a puddle.
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Prep Time 10 minutes
Cook Time 15 minutes
Cool Time 5 minutes
Total Time 30 minutes
Course Desserts
Cuisine American
Servings 4
Calories 283 kcal

Equipment

  • Air fryer
  • 4 small ramekins
  • 2 mixing bowls
  • Fork

Ingredients
 
 

For the apple filling

  • 3 medium apples cored and cut into ½-inch pieces
  • ¼ cup granulated sugar for the filling
  • 1 tablespoon cornstarch
  • 1 teaspoon ground cinnamon for the filling
  • ¼ teaspoon ground nutmeg for the filling
  • 1 tablespoon lemon zest

For the crisp topping

  • ½ cup rolled oats
  • ¼ cup all-purpose flour
  • 3 tablespoons granulated sugar for the topping
  • ½ teaspoon ground cinnamon for the topping
  • ¼ teaspoon ground nutmeg for the topping
  • 1 pinch salt
  • 2 tablespoons unsalted butter melted

Instructions
 

  • Preheat the air fryer to 375°F for 3 to 5 minutes while you make the filling and topping.
  • Core the apples and cut them into ½-inch pieces. Peeling is optional. The skins soften as they cook.
  • In a medium bowl, toss the apples with ¼ cup sugar, the cornstarch, 1 teaspoon cinnamon, ¼ teaspoon nutmeg, and the lemon zest until every piece is coated.
    Diced green apples coated with cinnamon and sugar in a clear glass bowl.
  • In a second bowl, combine the oats, flour, 3 tablespoons sugar, ½ teaspoon cinnamon, ¼ teaspoon nutmeg, and salt. Pour the melted butter over the dry ingredients and stir with a fork until the mixture turns crumbly with some pea-sized clumps.
    A clear bowl containing a mixture of dry rolled oats and flour sitting on a white surface.
  • Divide the apple filling between the 4 ramekins, and press it down gently. Leave about ¼ inch of space at the top so the bubbling filling does not spill into the air fryer basket.
    Four white ramekins filled with chopped green apples sprinkled with cinnamon and sugar, arranged on a white surface.
  • Sprinkle the topping evenly over the apples without packing it down.
    Three white ramekins filled with an oat crumble topping, arranged in a triangle on a light-colored surface.
  • Place the ramekins in the preheated air fryer basket and air fry at 375°F for 15 minutes, until the topping is golden brown and the filling bubbles around the edges. If your ramekins do not all fit at once, cook them in batches.
    Four white ramekins filled with oat crumble topping and diced fruit are arranged in a black air fryer basket, ready to be baked.
  • Insert a fork into the apples. If it meets resistance, air fry 2 to 3 minutes more and check again.
    Four white ramekins filled with baked oat crumble sit inside a black air fryer basket, viewed from above.
  • Let the crisp cool for 5 minutes before serving, so the molten filling thickens slightly.
    Four ramekins filled with apple crisp topped with ice cream and caramel sauce, placed on brown parchment paper with green apple slices.

Notes

Instead of ramekins, this will also bake in one 6-inch round baking dish that fits in the air fryer basket.
Taste an apple slice before you mix the filling. Very tart apples take 1 tablespoon more sugar, and sweet ones take a little less.
Serve: Serve warm with vanilla ice cream, whipped cream, or a drizzle of heavy cream.
Store: Refrigerate covered for 3 to 4 days and reheat in the air fryer at 320°F for 3 to 4 minutes to crisp the topping again. Freeze wrapped in plastic and foil for up to 3 months.

Nutrition

Serving: 1crispCalories: 283kcalCarbohydrates: 56gProtein: 3gFat: 7gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gTrans Fat: 0.2gCholesterol: 15mgSodium: 13mgPotassium: 200mgFiber: 5gSugar: 36gVitamin A: 252IUVitamin C: 8mgCalcium: 27mgIron: 1mg
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