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Easy Creamy Overnight Blueberry Baked Oatmeal

easy creamy overnight blueberry baked oatmeal - featured image

A creamy, comforting baked oatmeal with juicy blueberries, perfect for effortless and satisfying breakfasts. Prepped the night before and baked in the morning for a warm, indulgent start to your day.

Ingredients

Scale
  • 1 1/2 cups (135g) rolled oats (old-fashioned preferred)
  • 1 teaspoon baking powder
  • 1/2 teaspoon ground cinnamon
  • 1/4 teaspoon salt
  • 2 cups (480ml) whole milk (or almond/oat milk for dairy-free)
  • 2 large eggs, room temperature
  • 1/4 cup (60ml) honey or maple syrup
  • 1 teaspoon vanilla extract
  • 1 cup (150g) frozen or fresh blueberries
  • 2 tablespoons unsalted butter, melted

Instructions

  1. Preheat the oven to 350°F (175°C).
  2. In a large bowl, stir together rolled oats, baking powder, cinnamon, and salt.
  3. In another bowl, whisk eggs with milk, honey or maple syrup, vanilla extract, and melted butter until smooth.
  4. Pour the wet mixture into the oats and stir gently until moistened. Let sit for 5 minutes to absorb liquid.
  5. Carefully fold in blueberries without overmixing.
  6. Pour mixture into a greased 9×9-inch baking dish and spread evenly.
  7. Bake for 35-40 minutes until the top is golden and set but slightly soft in the center. A toothpick should come out mostly clean with a few moist crumbs.
  8. Let cool for 5 minutes before serving. Enjoy warm or at room temperature.

Notes

Use old-fashioned rolled oats for best texture; quick oats can become mushy. Let oats soak for 5 minutes before baking for creamy custard-like texture. Fold blueberries gently to avoid turning batter purple. Cover with foil if edges brown too fast. Adjust sweetness to taste. For dairy-free, use plant-based milk and substitute butter with coconut oil or dairy-free margarine. Can add nuts or chocolate chips on top before baking for variation.

Nutrition

Keywords: baked oatmeal, blueberry oatmeal, overnight oatmeal, creamy oatmeal, healthy breakfast, easy breakfast, make-ahead breakfast