Name: Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe
Prep time: 15 min
Cook time: 40 min
Total time: 55 min
Cuisine: American
Ingredients: 2 cups old fashioned rolled oats; 2 cups unsweetened almond milk or milk of your choice; ⅓ cup pure maple syrup or sweetener of your choice; 2 teaspoons ground cinnamon; 1 large egg, beaten; 1 teaspoon baking powder; 1½ cups fresh or frozen blueberries (thawed if frozen); 1 cup old fashioned rolled oats; ½ cup all purpose flour (substitute with oat flour or almond meal if gluten intolerant); ½ cup brown sugar, packed (or substitute with coconut sugar); ¼ teaspoon salt; ½ cup coconut oil, melted (or substitute with melted butter)

Jump to Recipe· 4.3 from 8 reviews

If you’re looking for a cozy, wholesome breakfast that feels like a warm hug in every bite, look no further than this Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe. Imagine tender, fluffy oats studded with juicy blueberries and crowned with a crunchy, buttery streusel that bakes to golden perfection. It’s the kind of breakfast you can prep the night before, then wake up to an irresistible aroma filling your kitchen. Whether you’re meal prepping for a busy week or hosting a lazy weekend brunch, this recipe brings joy, comfort, and a splash of sweetness to your mornings.

Ingredients You’ll Need

The image shows an arrangement of ten clear or white bowls and one brown egg on a white marbled surface. At the top left is a small rectangular white bowl filled with dark blue blueberries. Below it is a single brown egg placed loose on the surface. To the right of the egg is a small round clear bowl with white baking powder. Next to the baking powder is an oval white bowl holding a creamy, light beige almond milk. Below the milk is a round clear bowl filled with light brown, crumbly brown sugar. To the left of the brown sugar is a clear bowl holding a dark amber maple syrup. In the center is a bowl filled with white flour and a grey spoon resting inside. Below the flour is a large round clear bowl with light beige oats. To the right of the oats is a small clear bowl with ground cinnamon, showing its warm reddish-brown color. Above the cinnamon is a small clear cup holding light yellow oil. Each ingredient is clearly visible and spaced neatly on the white marbled surface photo taken with an iphone --ar 4:5 --v 7

Gathering the right ingredients is key to making your Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe truly shine. Each element plays its role perfectly, from the oaty base that provides hearty texture to the cinnamon that adds warmth and spice, while the blueberries burst with fresh flavor and the streusel offers that essential crunch. Ready to see what you’ll need?

Old fashioned rolled oats for the base: Provides that perfect chewy texture and nutty flavor essential for baked oatmeal.
Unsweetened almond milk (or milk of choice): Keeps the dish creamy without overpowering the other flavors.
Pure maple syrup: Adds natural sweetness and depth without being too sugary.
Ground cinnamon: Gives a cozy warmth that complements the blueberries beautifully.
Large egg: Binds everything together to give structure and fluffiness after baking.
Baking powder: Helps the oatmeal rise and become delightfully tender inside.
Fresh or frozen blueberries: The star fruity component that delivers juicy pops of flavor.
For the streusel topping – oats: Adds a hearty, rustic crunch that contrasts perfectly with the baked oats.
All purpose flour (or oat flour/almond meal): Binds the streusel and adds a slight crumb texture.
Brown sugar (or coconut sugar): Imparts a rich caramelized sweetness and moisture to the topping.
Salt: Enhances all the flavors and balances the sweetness.
Coconut oil (or melted butter): Creates that irresistible buttery crispiness in the streusel topping.

How to Make Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe

Step 1: Prepare the oat mixture the night before

This is the magic step where soaking works its wonders. Combine the rolled oats, almond milk, maple syrup, and cinnamon in a medium to large bowl. Give it a good stir so everything blends beautifully, then cover it tightly and pop it into the fridge overnight. This soak softens the oats just enough without cooking them, setting the stage for perfectly tender baked oatmeal the next morning. Important note — don’t add the egg or baking powder until step two.

Step 2: Mix in egg, baking powder, and blueberries

The next morning, preheat your oven to 375 degrees and grease an 8×8-inch baking dish. Stir the beaten egg and baking powder into your soaked oat mixture; these will help your oatmeal fluff up and hold together beautifully. Gently fold in the fresh or thawed blueberries, being careful not to break them up too much, then pour the mixture evenly into your prepared baking dish. This colorful, dreamy mixture is the foundation of your upcoming breakfast delight.

Step 3: Prepare the streusel topping

While the oats are settling into their baking dish, mix together the topping components. In a medium bowl, combine oats, flour, brown sugar, and a pinch of salt. Then slowly stir in the melted coconut oil so the sugar and flour absorb the fat evenly. Your streusel should be crumbly but hold together when pinched — it will crisp up perfectly once baked. Generously sprinkle it over the oatmeal, covering every bit with that delicious, golden crumble.

Step 4: Bake until golden and bubbling

Pop your baking dish onto the middle rack of the oven and let it bake for 30 to 40 minutes. Keep an eye on the streusel; if it starts to brown too quickly, cover the top loosely with foil to prevent burning while the oats finish cooking through. You’ll know it’s ready when most of the liquid has been absorbed, the blueberries have softened, and the top is golden and crisp. Once baked, remove it from the oven and let it cool on a wire rack for 10 to 15 minutes. That brief wait lets the oatmeal set up perfectly for serving.

How to Serve Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe

A square piece of fruit crumble sits in the middle of a plain white plate, showing two main layers. The bottom layer is a mix of soft, juicy dark purple and red berries with a slightly mushy texture, while the top layer is golden-brown oats that look crunchy and crumbly. On the left side of the plate, there is a shiny silver spoon resting next to the crumble. In the background, part of a white rectangular baking dish filled with more crumble is visible on a metal cooling rack, while a blue and white striped cloth is placed to the right, all set on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

The best part about serving baked oatmeal is how easy it is to customize with simple, fresh toppings. A dollop of Greek yogurt or a splash of cream can enhance the creaminess, while a drizzle of pure maple syrup or a handful of toasted nuts adds extra texture and sweetness. Fresh blueberries or a sprinkle of cinnamon on top also make it look irresistible and boost the flavors.

Side Dishes

This oatmeal pairs wonderfully with light, fresh sides. Think crisp apple slices, a simple mixed green salad with a tangy vinaigrette, or even a small serving of scrambled eggs for a protein boost. These options complement the hearty oats without overwhelming the gentle blueberry notes.

Creative Ways to Present

Want to impress guests or make weekday mornings feel special? Serve slices of the baked oatmeal warm on pretty plates, topped with seasonal berries, edible flowers, or a sprinkle of chia seeds. For a grab-and-go option, cut into squares the night before and wrap individually for a quick breakfast or snack. You could even layer leftovers in a mason jar with yogurt and granola for a parfait-style treat.

Make Ahead and Storage

Storing Leftovers

This Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe keeps incredibly well in the fridge for up to 4 days. Store leftovers in an airtight container to retain moisture and freshness. It’s perfect for busy mornings when you need a wholesome breakfast waiting for you.

Freezing

You can absolutely freeze this baked oatmeal to save time on future breakfasts. Cut it into squares and place parchment paper between layers in a freezer-safe container or bag. It stays fresh for up to 3 months and thaws quickly when you need a comforting meal.

Reheating

Reheat individual portions in the microwave for about 1 to 2 minutes until warm throughout, or place in a preheated oven at 350 degrees for 10-15 minutes to retain the streusel’s crunch. A little splash of milk before reheating helps keep it moist and delicious.

FAQs

Can I use frozen blueberries in this recipe?

Yes! Frozen blueberries work beautifully in the Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe. Just be sure to thaw them first so they don’t add too much extra liquid to the batter.

Is it possible to make this recipe dairy-free?

Absolutely! Using almond milk or another plant-based milk and substituting coconut oil for butter in the streusel topping makes this entire recipe dairy-free without compromising on flavor or texture.

Can I substitute the maple syrup with another sweetener?

Feel free to swap maple syrup for honey, agave nectar, or even coconut sugar. Each sweetener will lend a slightly different flavor, but the Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe is quite forgiving and delicious with many options.

How do I make this recipe gluten-free?

Simply use certified gluten-free rolled oats and substitute the all-purpose flour in the streusel with oat flour or almond meal. This adjustment keeps everything safe without losing that wonderfully crumbly topping.

Can I make this recipe vegan?

With a few modifications like replacing the egg with flaxseed meal mixed with water and using plant-based milk and coconut oil, you can enjoy a vegan version of the Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe that’s just as satisfying.

Final Thoughts

There’s something truly special about sinking your spoon into warm, flavorful baked oatmeal that’s been thoughtfully prepared overnight. This Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe combines ease, comfort, and vibrant flavors into a single dish that will quickly become a household favorite. If you haven’t tried baked oatmeal before, this recipe is the perfect place to start, promising a cozy breakfast that feels both nourishing and indulgent. Give it a go—you might just find your new favorite way to start the day.

Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe

Ingredients You’ll Need

How to Make Overnight Blueberry Baked Oatmeal with Streusel Topping Recipe

Step 1: Prepare the oat mixture the night before