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Overnight Blueberry Baked Oatmeal

Overnight Blueberry Baked Oatmeal

The Overnight Blueberry Baked Oatmeal is a delightful, make-ahead breakfast that saves you precious morning minutes without sacrificing flavor or satisfaction. This recipe offers the comforting warmth of baked oatmeal infused with sweet blueberries, perfect for busy weekdays or leisurely weekend brunches.
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Prep Time 10 minutes
Cook Time 30 minutes
Chilling Time 4 minutes
Servings: 6 servings
Course: Breakfast
Ingredients Equipment Method Notes

Ingredients
  

  • 1 ½ cups rolled oats old-fashioned oats are best
  • 1 teaspoon baking powder
  • ½ teaspoon ground cinnamon
  • ¼ teaspoon salt
  • 2 tablespoons granulated sugar or your preferred sweetener, adjust to taste
  • 1 ½ cups milk dairy or non-dairy like almond, soy, or oat milk
  • 2 large eggs lightly beaten
  • 2 tablespoons unsalted butter melted (or coconut oil for a dairy-free option)
  • 1 teaspoon vanilla extract
  • 1 cup fresh or frozen blueberries if using frozen, do not thaw
Optional toppings

Equipment

  • Medium-sized mixing bowl
  • Large mixing bowl
  • 8x8 inch baking dish or individual ramekins
  • Plastic wrap or lid
  • Baking Sheet

Method
 

  1. In a medium-sized mixing bowl, combine the rolled oats, baking powder, cinnamon, salt, and granulated sugar. Whisk everything together thoroughly to ensure the leavening agent and spices are evenly distributed throughout the oats. This step is crucial for an even bake.
    1 ½ cups rolled oats, 1 teaspoon baking powder, ½ teaspoon ground cinnamon, ¼ teaspoon salt, 2 tablespoons granulated sugar
  2. In a separate, larger bowl, whisk together the milk, lightly beaten eggs, melted butter (or coconut oil), and vanilla extract until well combined and smooth. This creates the rich, creamy base for your baked oatmeal.
    1 ½ cups milk, 2 large eggs, 2 tablespoons unsalted butter, 1 teaspoon vanilla extract
  3. Pour the wet ingredients into the bowl with the dry ingredients. Stir gently until just combined. Be careful not to overmix; you just want to ensure all the oats are moistened. A few small lumps are perfectly fine.
  4. Gently fold in the fresh or frozen blueberries into the oat mixture. If you're using frozen blueberries, you can add them directly without thawing – this prevents them from bleeding too much color too early and keeps their vibrant speckles throughout the baked oatmeal.
    1 cup fresh or frozen blueberries
  5. Lightly grease an 8x8 inch baking dish or individual ramekins with butter or cooking spray. Pour the oat mixture evenly into the prepared dish or divide it among the ramekins. Cover the dish tightly with plastic wrap or a lid. Refrigerate for at least 4 hours, or preferably overnight, allowing the oats to soften and absorb the liquid, which is key for the "overnight" magic.
  6. When you're ready to bake, preheat your oven to 375°F (190°C). Remove the plastic wrap from the baking dish.
  7. Place the baking dish on a baking sheet (to catch any potential spills) and bake for 30-40 minutes for a large dish, or 20-25 minutes for individual ramekins. The baked oatmeal should be set in the center and lightly golden around the edges. A toothpick inserted into the center should come out mostly clean, with perhaps a few moist crumbs.
  8. Let the Overnight Blueberry Baked Oatmeal cool for about 5-10 minutes before serving. This allows it to set up further. Serve warm, topped with your favorite additions like a dollop of Greek yogurt, a drizzle of maple syrup, or extra fresh blueberries.

Notes

This baked oatmeal offers a warm, comforting texture reminiscent of a cozy bakery treat. It's the ultimate breakfast hack for busy mornings, providing a delicious and healthy start to your day with minimal effort.