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Oatmeal Cookie Apple Crisp

Oatmeal cookie apple crisp with a golden, oatmeal-style crumble and bubbling cinnamon apple filling. Baked until the edges turn crisp and the topping forms chunky, cookie-like clusters.
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Prep Time 20 minutes
Cook Time 45 minutes
resting 10 minutes
Total Time 1 hour 15 minutes
Servings: 8 servings
Course: Dessert
Cuisine: American
Calories: 430
Ingredients Equipment Method Notes

Ingredients
  

apple filling
  • 6 large apples peeled and sliced
  • 0.33 cup granulated sugar
  • 2 tsp cinnamon
  • 0.25 tsp nutmeg
  • 2 tbsp cornstarch
  • 1 tbsp lemon juice
oatmeal cookie crumble
  • 2 cup rolled oats
  • 1 cup all-purpose flour
  • 1 cup brown sugar, packed packed
  • 1 tsp cinnamon
  • 0.5 tsp baking soda
  • 0.5 tsp salt
  • 1 cup unsalted butter, melted
  • 2 tbsp honey
  • 1 tsp vanilla extract
  • 0.5 cup raisins or dried cranberries, optional optional

Equipment

  • 1 sheet pan

Method
 

Preheat and prep the dish
  1. Preheat oven to 375F and grease a 9x13 baking dish.
  2. Visually confirm the dish is evenly greased so the topping can crisp at the edges.
Make the cinnamon apple filling
  1. Toss apple slices with granulated sugar, cinnamon, nutmeg, cornstarch, and lemon juice, then spread evenly in the greased dish.
  2. Arrange the apples in a single even layer so the filling bubbles at the corners.
Assemble the oatmeal cookie crumble
  1. Combine rolled oats, all-purpose flour, brown sugar, cinnamon, baking soda, and salt in a bowl.
  2. Stir melted butter, honey, and vanilla together, then pour over the oat mixture and toss until every clump looks evenly moistened.
  3. Fold in raisins or dried cranberries if using.
  4. Scatter the oatmeal crumble in large chunks over the apples so the topping covers the surface.
Bake
  1. Bake 40-45 minutes at 375F until the topping is golden and the filling is actively bubbling.
  2. Look for crisp caramelized edges along the perimeter of the baking dish.
Rest and serve
  1. Rest 10 minutes after baking so the juices thicken slightly and the crumble sets.
  2. Serve warm for the best texture, ideally alongside ice cream.

Notes

For the crispiest, cookie-like topping, keep the crumble chunky (don’t press it into a smooth layer) and make sure the apples are spread evenly. Store covered in the refrigerator up to 4 days; reheat individual portions at 350F until warm. Freezing is not recommended due to the crumble texture. For a dairy-free swap, use a plant-based butter stick melted 1:1 in the crumble.