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Overnight Blueberry Baked Oatmeal

  • Author: The Cozy Kitchen

Description

A delicious and healthy make-ahead breakfast with juicy blueberries, hearty oats, and warm cinnamon flavors. Perfect for meal prep!


Ingredients

Scale

For the Crust:

  • For the oatmeal base:
  • 2 cups old-fashioned rolled oats
  • 1 tsp baking powder
  • 1 tsp ground cinnamon
  • 1/4 tsp salt
  • 1 large egg
  • 1/4 cup maple syrup
  • 1 tsp vanilla extract
  • 1 1/2 cups milk (dairy or plant-based)
  • For the blueberry layer:
  • 1 1/2 cups fresh or frozen blueberries
  • 1 tbsp lemon juice
  • 1 tbsp cornstarch
  • For topping (optional):
  • 2 tbsp brown sugar
  • 1/4 cup chopped walnuts

Instructions

1. Prepare the Crust:

  1. 1. Grease an 8×8-inch baking dish and preheat oven to 375°F (190°C).
  2. 2. In a large bowl, mix oats, baking powder, cinnamon, and salt.
  3. 3. In another bowl, whisk egg, maple syrup, vanilla, and milk until combined.
  4. 4. Pour wet ingredients into dry ingredients and stir until fully incorporated.
  5. 5. In a separate bowl, toss blueberries with lemon juice and cornstarch.
  6. 6. Spread half the oat mixture in the prepared dish, top with blueberry mixture, then remaining oats.
  7. 7. Sprinkle with brown sugar and walnuts if using.
  8. 8. Cover and refrigerate overnight (or at least 4 hours).
  9. 9. Bake uncovered for 35-40 minutes until golden and set.
  10. 10. Let cool 5 minutes before serving.

Notes

For vegan version: Use flax egg and plant-based milk. Can substitute other berries. Stores well refrigerated for 4 days.