Put quick-cooking oats, flour, brown sugar, baking powder, and baking soda in a bowl and stir to combine.
Add cold, cubed butter. Stir to coat. Use a pastry blender to cut the butter. Set aside.
Mini Apple Crisps:
Put peeled, diced, tart apples in a bowl. Add granulated sugar, brown sugar, flour, ground cinnamon, and ground nutmeg. Stir to coat.
Divide coated apples between baking cups lined up in a large rimmed baking sheet.
Top the mini apple crisps with the crumb topping.
Bake the individual apple crisps at 375˚F for 30-35 minutes or until the apples are tender and the crumb topping is golden.
Cool, cover, and store in the fridge until ready to serve. Unwrap and warm the mini apple crisps before serving.
Optional: Drizzle with caramel sauce and serve with vanilla ice cream or whipped cream.
Video
Notes
One: Storage
After baking, allow the crisps to cool completely. Then, cover each one with plastic wrap and store them in the fridge until ready to serve.
Two: Reheating
When ready to serve, unwrap and warm the mini apple crisps. You can reheat them quickly in the microwave or in the oven at 350˚F for about 10 minutes.
Three: Freezer
To freeze before baking, wrap each one with plastic wrap and then foil and place them in an airtight freezer bag for up to two months. To bake, unwrap and loosely cover the tops with foil and bake for 20 minutes. Remove the foil and bake until the apples are tender and the topping is golden.