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make-ahead blueberry baked oatmeal - featured image

Make-Ahead Blueberry Baked Oatmeal: Easy Meal Prep


  • Author: Nora Winslow
  • Total Time: 55-60 minutes
  • Yield: 8 servings 1x

Description

A comforting, hearty breakfast that reheats beautifully and improves in flavor over several days. This easy meal prep recipe uses simple pantry staples to create a warm, chewy, and customizable oatmeal dish perfect for busy mornings.


Ingredients

Scale
  • 3 cups old-fashioned rolled oats
  • 1 tablespoon baking powder
  • 1 teaspoon cinnamon
  • ½ teaspoon salt
  • 2 cups milk (dairy or plant-based)
  • 2 large eggs
  • ½ cup brown sugar
  • 1 teaspoon vanilla extract
  • 2 cups blueberries (fresh or frozen)
  • Optional: ½ cup chopped walnuts or pecans
  • Optional: ¼ cup chia seeds
  • Optional Topping: 2 tablespoons rolled oats, 1 tablespoon brown sugar, pinch of cinnamon

Instructions

  1. Preheat oven to 350°F (175°C). Grease an 8×8 inch baking dish with butter or cooking spray.
  2. In a large mixing bowl, combine the rolled oats, baking powder, cinnamon, and salt. Stir to distribute evenly.
  3. In a separate bowl or large measuring cup, whisk together the milk, eggs, brown sugar, and vanilla extract until smooth and sugar is mostly dissolved.
  4. Pour the wet mixture into the dry ingredients and stir gently but thoroughly until all oats are coated. Let the mixture sit for 5 minutes to allow oats to absorb liquid.
  5. Stir in the blueberries. If using fresh blueberries, you may toss them in a little flour to prevent sinking.
  6. If using the optional topping, mix the topping ingredients and sprinkle evenly over the oatmeal, pressing gently to adhere.
  7. Bake for 40-45 minutes, or until the top is golden brown, edges are pulling away from the pan, and a knife inserted in the center comes out clean.
  8. Remove from oven and let cool for at least 15-20 minutes to allow the oatmeal to set before cutting into squares.

Notes

Do not use instant or steel-cut oats; old-fashioned rolled oats are required for the correct texture. Let the batter rest for 5 minutes before baking to ensure proper hydration. For best storage, let the oatmeal cool completely before covering to prevent condensation. Reheat with a splash of milk to restore moisture.

  • Prep Time: 10 minutes
  • Cook Time: 40-45 minutes
  • Category: Breakfast
  • Cuisine: American

Nutrition

  • Serving Size: 1 square (1/8 of the
  • Calories: 280
  • Sugar: 18
  • Sodium: 250
  • Fat: 7
  • Saturated Fat: 2
  • Carbohydrates: 45
  • Fiber: 5
  • Protein: 10

Keywords: baked oatmeal, blueberry oatmeal, meal prep breakfast, make ahead breakfast, healthy oatmeal, gluten-free breakfast, easy breakfast recipe