- cooking spray
- 3 McIntosh apples, cored and sliced
- 2 teaspoons ground cinnamon, divided
- 3/4 cup all-purpose flour
- 1/4 cup rolled oats
- 1/2 cup white sugar
- 1/2 cup brown sugar, divided
- 1/4 cup water
- 1 egg, beaten
- 1 tablespoon melted butter
- Preheat oven to 350 degrees F (175 degrees C). Grease an 8×8-inch baking dish with cooking spray.
- Arrange apples in the bottom of the prepared baking dish; sprinkle with 1/2 teaspoon cinnamon.
- Combine flour, oats, white sugar, and 1/4 cup brown sugar in a bowl; mix in 1/2 teaspoon cinnamon. Stir in water and egg until smooth. Spread batter evenly over apple mixture.
- Mix remaining 1/4 cup brown sugar and remaining 1 teaspoon cinnamon together in a bowl; sprinkle over batter. Dot with butter.
- Bake in the preheated oven until golden, 45 to 50 minutes.