Every time I pull this Overnight Blueberry Baked Oatmeal from the oven, it feels like I’m treating myself to a cozy hug in a dish. The golden, crisp streusel topping contrasts beautifully with the fluffy oats and juicy blueberries, creating a breakfast experience that’s both comforting and immensely satisfying. This oatmeal recipe is a game-changer for busy mornings—just prep it the night before and wake up to an aroma that dances through your home like a morning serenade. Not only is it quick and easy to whip up, but it also doubles as a delightful brunch option that will impress friends and family alike. Curious about how to make this scrumptious dish your new morning staple? Let’s dive in!

Why is Overnight Oatmeal So Special?
Convenience: This oatmeal recipe is a breeze to prepare—just mix the ingredients the night before and let the fridge handle the rest.
Nutritious Start: Packed with fiber from oats and antioxidants from blueberries, it’s a wholesome breakfast that fuels your day.
Versatile Variations: Easily adapt this dish to your tastes by swapping blueberries for bananas or adding spices like nutmeg—experiment to find your favorite blend!
Brunch Ready: Impress guests at brunch gatherings with minimal effort. Pair it with some fresh fruit or Greek yogurt for a complete feast!
Meal Prep Wonder: Ideal for busy lifestyles, you can make it ahead and store leftovers for up to five days, ensuring your mornings are stress-free.
If you love this oatmeal, be sure to check out our Chili Every Week for more delicious meal prep ideas!
Oatmeal Recipe Ingredients
Unlock the secrets to making the perfect Overnight Blueberry Baked Oatmeal with these straightforward ingredients!
For the Oat Mixture
- Rolled Oats – The essential base that gives the oatmeal its hearty texture. Substitution: Quick oats can be used in a pinch, but prefer rolled oats for the best texture.
- Almond Milk – Adds a creamy consistency while keeping the dish dairy-free. Substitution: Any plant-based milk or regular milk can be used.
- Maple Syrup – Delivers natural sweetness for a delightful flavor. Substitution: Honey or agave nectar can also be utilized for sweetness.
- Ground Cinnamon – Infuses the dish with warmth and flavor. Note: Adjust based on personal taste preferences.
- Egg – Binds the mixture and contributes to its fluffy structure. Substitution: Replace with a flax egg for a vegan option.
For Baking
- Baking Powder – Helps the oatmeal rise for a light, cake-like texture. Note: Ensure it’s fresh for optimal results.
- Blueberries – Provide juicy bursts of flavor throughout the dish. Preparation Note: Thaw frozen blueberries and drain before use to avoid excess moisture.
For the Streusel Topping
- Flour – Creates the desired texture in the streusel. Substitution: Any all-purpose flour works; consider oat flour for a gluten-free option.
- Brown Sugar – Adds sweetness and depth to the streusel. Substitution: Coconut sugar offers a healthier alternative.
- Coconut Oil – Provides a rich flavor to the streusel topping. Substitution: Butter or vegan butter can be used instead.
- Salt – Enhances the overall flavor of both the oatmeal mixture and the streusel.
Have these ingredients ready, and you’ll be on your way to mastering this delicious oatmeal recipe in no time!
Step‑by‑Step Instructions for Overnight Blueberry Baked Oatmeal
Step 1: Prep Oats
In a medium bowl, combine rolled oats, almond milk, maple syrup, and ground cinnamon. Stir well to ensure all ingredients are evenly mixed. Cover the bowl with plastic wrap and place it in the refrigerator overnight, allowing the oats to soak and absorb the liquid, creating a creamy base for your oatmeal recipe.
Step 2: Bake Prep
The next morning, preheat your oven to 375°F (190°C). While the oven heats, grease an 8×8 inch baking dish with cooking spray or coconut oil to prevent sticking. This preparation ensures the edges of your Overnight Blueberry Baked Oatmeal are perfectly golden and easy to serve.
Step 3: Combine Ingredients
After the oats have soaked, remove the bowl from the refrigerator. Add a beaten egg and baking powder to the oat mixture, stirring gently until well combined. Carefully fold in the blueberries, ensuring they are evenly distributed throughout the mixture for bursts of flavor in your final dish.
Step 4: Make Streusel
In a separate bowl, mix rolled oats, flour, brown sugar, and salt to create the streusel topping. Pour in melted coconut oil and stir until the mixture becomes crumbly. This crunchy layer will provide a delightful contrast to the soft oatmeal base in your baked oatmeal recipe.
Step 5: Assemble
Pour the oat mixture into the prepared baking dish, spreading it evenly with a spatula. Next, sprinkle the streusel topping generously over the oats, ensuring every corner is covered. Bake the dish in the preheated oven for 30-40 minutes, or until it turns golden brown and the center is set.
Step 6: Cool and Serve
Once baked, remove the dish from the oven and let it cool for 10-15 minutes. This cooling time allows the flavors to meld and makes slicing easier. Serve your warm Overnight Blueberry Baked Oatmeal with optional toppings like yogurt or fresh fruit for an extra touch of deliciousness.

What to Serve with Overnight Blueberry Baked Oatmeal
Start your morning right by building a delightful meal around this comforting baked dish.
- Greek Yogurt: A dollop of creamy Greek yogurt adds protein and a luscious texture, balancing the sweetness beautifully.
- Fresh Fruit Salad: Bright, juicy fruits like strawberries and kiwi provide a refreshing contrast to the warm oatmeal, enhancing your breakfast spread.
- Scrambled Eggs: Fluffy scrambled eggs deliver a savory element that pairs well with the sweetness of the oatmeal. It adds a satisfying balance to the meal.
- Nut Butter Drizzle: A drizzle of almond or peanut butter over the warm oatmeal not only elevates the flavor but also adds healthy fats for sustained energy.
- Maple Syrup: Serve extra maple syrup on the side for those who enjoy a little more sweetness, creating a deliciously indulgent experience.
- Coffee or Tea: A steaming cup of coffee or herbal tea perfectly complements this comforting breakfast, enhancing the overall warmth and morning ritual.
- Granola Topping: Sprinkle some crunchy granola on top for an added layer of texture, providing a satisfying crunch with every bite.
- Chia Seed Pudding: Pairing this oatmeal with chia seed pudding creates a delightful layered experience, showcasing different textures and flavors.
Oatmeal Recipe Variations & Substitutions
Discover how you can easily personalize this scrumptious oatmeal recipe to suit your tastes and dietary preferences!
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Berried Bliss: Swap blueberries for raspberries or diced strawberries to mix up the flavor profile.
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Fruit Fusion: Try adding diced apples or sliced bananas for a deliciously sweet alternative that brings a whole new texture.
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Nutty Crunch: Sprinkle in some chopped nuts like walnuts or almonds to introduce a satisfying crunch and boost protein.
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Vegan Delight: For a completely plant-based version, replace the egg with a flax egg made from ground flaxseed and water.
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Sweetness Swap: Use honey or agave nectar instead of maple syrup for a different sweetness that works well with the oatmeal.
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Spice It Up: Get creative! Add in spices like nutmeg or cardamom to elevate the warmth and aroma of your oatmeal.
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Creamy Variance: Substitute almond milk with oat milk or regular milk for a creamier texture depending on your needs.
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Personal Portions: Bake the oatmeal in individual ramekins for a charming brunch presentation that everyone will love!
Whether you enjoy a traditional breakfast or a delightful twist, this oatmeal recipe is your canvas! If you’re also looking for a hearty meal prep idea, why not explore our Turkey Chili Comforting or the exquisite Coconut Poke Cake? There’s endless fun in the kitchen awaiting you!
Make Ahead Options
These Overnight Blueberry Baked Oatmeal are perfect for meal prep enthusiasts! You can prepare the oat mixture up to 24 hours in advance by combining the rolled oats, almond milk, maple syrup, and cinnamon, then covering and refrigerating it overnight. The streusel topping can also be made ahead by mixing the rolled oats, flour, brown sugar, and coconut oil, then storing it in an airtight container for up to 3 days. When you’re ready to bake, simply preheat the oven, fold in the beaten egg and blueberries into the oatmeal mixture, top with streusel, and bake until golden. This way, busy mornings transform into moments where you can enjoy a delicious homemade breakfast without fuss!
Expert Tips for Overnight Oatmeal Recipe
• Fresh Ingredients: Always use fresh blueberries and ensure your baking powder is not expired for optimal results.
• Mix Well: Stir the oat mixture thoroughly to ensure even distribution of flavors and prevent clumping.
• Overbake Caution: Watch the baking time closely; cover with foil if the streusel browns too quickly to prevent burning.
• Perfect Portions: To avoid wasting food, slice and store leftovers in individual portions, making reheats a breeze!
• Tailored Sweetness: Adjust the amount of maple syrup based on your sweetness preference for the best oatmeal recipe experience.
How to Store and Freeze Overnight Blueberry Baked Oatmeal
Fridge: Store leftover oatmeal tightly wrapped in plastic wrap or in an airtight container for up to 5 days. The flavor can improve as it sits!
Freezer: Portion the baked oatmeal into individual servings and freeze for up to 3 months. This makes it easy to grab and heat when you’re short on time.
Reheating: For quick reheating, microwave individual portions for 30-60 seconds. Alternatively, bake larger pieces at 350°F until warmed through.
Flavor Tip: This oatmeal recipe actually enhances in taste over time in the fridge, making it an excellent choice for meal prep!

Overnight Blueberry Baked Oatmeal Recipe FAQs
How do I choose the best blueberries for this oatmeal recipe?
When selecting blueberries, look for plump, firm berries that have a deep blue color. Avoid any that are soft, shriveled, or have dark spots, as these can indicate overripeness. Fresh blueberries are always best, but if you use frozen, ensure they’re well-drained and thawed to prevent excess moisture in your oatmeal.
What’s the best way to store leftover Overnight Blueberry Baked Oatmeal?
You can store leftover baked oatmeal tightly wrapped in plastic wrap or in an airtight container in the refrigerator for up to 5 days. As it sits, the flavors even enhance, so it’s a tasty treat waiting for you each morning!
Can I freeze this oatmeal recipe? If so, how?
Absolutely! To freeze, cut the baked oatmeal into individual portions and wrap each piece tightly in plastic wrap or place them in freezer-safe containers. This allows for quick breakfasts later on. It can be stored for up to 3 months. Be sure to label each container with a date, so you know when to enjoy them!
What do I do if my streusel topping burns before the oatmeal is fully baked?
If you notice the streusel browning too quickly, simply cover the baked dish loosely with aluminum foil. This will shield the topping while allowing the oatmeal to continue baking evenly until it’s golden and set. Check frequently to avoid burning.
Is this oatmeal recipe safe for my allergy concerns?
This recipe is quite versatile! For nut allergies, you can substitute almond milk with oat or soy milk, or try a non-dairy option that suits your needs. For egg sensitivities, replacing the egg with a flax egg (1 tablespoon of ground flaxseed mixed with 2.5 tablespoons of water) will work perfectly. Always consult with your doctor if you’re unsure about any ingredient!
How long will the baked oatmeal stay fresh in the fridge?
Stored properly, the Overnight Blueberry Baked Oatmeal will remain fresh for up to 5 days in the refrigerator. It’s a wonderful meal prep option as it not only saves time but may also taste even better as the flavors meld together over time.

Delicious Overnight Oatmeal Recipe for Busy Mornings
Ingredients
Equipment
Method
- In a medium bowl, combine rolled oats, almond milk, maple syrup, and ground cinnamon. Stir well to ensure all ingredients are evenly mixed. Cover the bowl with plastic wrap and place it in the refrigerator overnight.

- The next morning, preheat your oven to 375°F (190°C). Grease an 8x8 inch baking dish to prevent sticking.

- Add a beaten egg and baking powder to the oat mixture, stirring gently until well combined. Carefully fold in the blueberries.

- In a separate bowl, mix rolled oats, flour, brown sugar, and salt to create the streusel topping. Pour in melted coconut oil and stir until crumbly.

- Pour the oat mixture into the prepared baking dish, spreading it evenly. Sprinkle the streusel topping over the oats. Bake for 30-40 minutes, or until golden brown.

- Remove from the oven and let cool for 10-15 minutes before serving.


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