Ingredients
Method
- Gather all ingredients.
- Preheat the oven to 350 degrees F (175 degrees C). Lightly grease an 8-inch square pan.
- Place brown sugar, oats, flour, and melted butter in a large bowl; mix until crumbly.

- Place 1/2 of the crumb mixture in the bottom of the prepared pan. Spread apples evenly over crumb mixture.

- Sprinkle with white sugar and cinnamon; top with remaining crumb mixture.

- Bake in the preheated oven until apples are bubbling and the top is crisp, golden brown, and caramelized around the edges, 40 to 45 minutes.

