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Overnight Blueberry Baked Oatmeal


  • Author: The Cozy Kitchen

Description

A delicious, make-ahead baked oatmeal packed with juicy blueberries and warm cinnamon flavors. Perfect for meal prep or a cozy weekend breakfast!


Ingredients

Scale

For the Crust:

  • For the oatmeal base:
  • 2 cups old-fashioned rolled oats
  • 1/3 cup packed brown sugar
  • 1 tsp baking powder
  • 1 tsp ground cinnamon
  • 1/4 tsp salt
  • For the wet ingredients:
  • 1 3/4 cups milk (any kind)
  • 1 large egg
  • 2 tbsp melted butter
  • 1 tsp vanilla extract
  • For the mix-ins:
  • 1 1/2 cups fresh or frozen blueberries
  • 2 tbsp maple syrup (optional topping)
  • Additional toppings (optional):
  • Greek yogurt
  • Chopped nuts
  • Extra blueberries

Instructions

1. Prepare the Crust:

  1. 1. Grease an 8×8 inch baking dish with butter or cooking spray.
  2. 2. In a large bowl, whisk together oats, brown sugar, baking powder, cinnamon, and salt.
  3. 3. In another bowl, whisk milk, egg, melted butter, and vanilla until combined.
  4. 4. Pour wet ingredients into dry ingredients and stir until fully incorporated.
  5. 5. Gently fold in 1 cup of blueberries (reserve 1/2 cup for topping).
  6. 6. Transfer mixture to prepared baking dish, spreading evenly.
  7. 7. Sprinkle remaining blueberries on top.
  8. 8. Cover and refrigerate overnight (8-12 hours).
  9. 9. In the morning, preheat oven to 375°F (190°C).
  10. 10. Bake uncovered for 35-45 minutes until set and golden.
  11. 11. Let cool 5 minutes before serving. Drizzle with maple syrup if desired.

Notes

For vegan version: Use plant-based milk, flax egg, and coconut oil. Frozen blueberries work perfectly – no need to thaw. Leftovers keep refrigerated for 4 days or frozen for 2 months.