2 large Granny Smith or Honeycrisp apples, peeled and cut into 1/2-inch cubes
1 tablespoon lemon juice
1/2 cup rolled oats (old-fashioned)
1/4 cup all-purpose flour
1/4 cup packed light brown sugar
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
3 tablespoons cold unsalted butter, cut into small cubes
A pinch of salt
Instructions
Peel, core, and dice your apples into uniform half-inch cubes. Place them in a medium bowl and toss them with the lemon juice. This prevents browning and adds a nice brightness to the flavor.
In a separate small bowl, combine the rolled oats, flour, brown sugar, cinnamon, nutmeg, and salt. Use a fork or your fingers to work the cold butter cubes into the mixture until it looks like coarse crumbs with some pea-sized chunks.
Add the diced apples to small ramekins or a shallow air-fryer-safe dish. If you prefer “bites” without a dish, you can toss the apples directly with the crumble mixture, though using small heat-safe liners helps keep the juices contained.
Preheat your air fryer to 350°F (175°C). Place the ramekins or the dish into the air fryer basket. Cook for 8 to 10 minutes, or until the apple pieces are tender when pierced with a fork and the oat topping is golden brown and crunchy.
Carefully remove the hot containers from the air fryer. Let them sit for 2 to 3 minutes to allow the juices to thicken slightly before serving.