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pple oatmeal bake slice showing layers of tender apples, cinnamon oats and crispy topping. Healthy breakfast casserole ready in 45 minutes for meal prep mornings.

Apple Oatmeal Bake

Wholesome breakfast casserole featuring layers of tender baked apples, cinnamon spiced oats and crispy nut topping. This apple oatmeal bake provides nutritious make ahead breakfast ready in 45 minutes for easy morning meal prep.
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings: 9
Course: Breakfast
Cuisine: American
Calories: 215
Ingredients Equipment Method Notes

Ingredients
  

  • 2 cups Old fashioned oats Not instant oats
  • 1.5 cups Milk Any variety
  • 3 medium Apples Granny Smith or Honeycrisp
  • 2 large Eggs Room temperature
  • ⅓ cup Brown sugar Packed, divided
  • 1 teaspoon Baking powder For fluffy texture
  • 2 teaspoon Ground cinnamon Divided
  • 1 teaspoon Vanilla extract Pure preferred
  • ¼ teaspoon Salt For flavor balance
  • 3 tablespoon Butter Melted, divided
  • ¼ cup Chopped walnuts or pecans For topping
  • 2 tablespoon Maple syrup Optional for serving

Equipment

  • 9x9 inch baking dish Square pan for even baking
  • Large mixing bowl For combining oat mixture
  • Small mixing bowl For topping mixture
  • Whisk For blending wet ingredients
  • Sharp knife For slicing apples
  • Cutting board For apple prep
  • Measuring cups and spoons For accurate measurements
  • Spatula For spreading mixture

Method
 

  1. Preheat oven to 375°F, grease 9x9 baking dish thoroughly
  2. Peel and slice apples thin, toss with 1 tablespoon brown sugar and half teaspoon cinnamon
  3. Arrange seasoned apple slices evenly in bottom of prepared baking dish
  4. Whisk eggs, milk, 2 tablespoons melted butter, remaining brown sugar, vanilla, cinnamon, baking powder and salt
  5. Stir in oats until coated, let sit 5 minutes to absorb liquid
  6. Spread oat mixture evenly over apple layer in dish
  7. Mix remaining oats, chopped nuts, cinnamon and remaining melted butter
  8. Sprinkle topping mixture over oatmeal layer
  9. Bake 35 to 40 minutes until golden brown and center is set
  10. Let cool 10 minutes, cut into squares, serve with maple syrup if desired

Notes

Nutrition information is automatically calculated, so should only be used as an approximation.