Overnight Berry Baked Oatmeal
Are you ready to start your day with a burst of flavor and nutrition? This Overnight Berry Baked Oatmeal is not just a breakfast dish; it’s a delightful way to energize your mornings with minimal effort. Imagine waking up to a warm, fruity, and wholesome oatmeal bake that’s been prepared the night before. It’s the perfect solution for busy mornings, making it easy to enjoy a healthy meal without compromising on taste. Whether you’re feeding a family or just looking for a comforting breakfast option, this recipe is a winner.
What Makes This Recipe Special

This Overnight Berry Baked Oatmeal stands out for its simplicity and versatility. By combining rolled oats with a medley of berries, you get a deliciously satisfying breakfast that’s also packed with antioxidants and fiber. The beauty of this recipe lies in its flexibility; you can use whatever berries you have on hand, whether they’re fresh from the farmer’s market or frozen from last summer’s harvest. Plus, it’s naturally sweetened with pure maple syrup, making it a wholesome choice to kickstart your day.
Ingredients at a Glance
- 1 1/2 cups unsweetened plain oat milk (or your favorite milk; almond milk works well too)
- 1 large egg
- 1/4 cup pure maple syrup
- 1 teaspoon pure vanilla extract
- 2 cups rolled oats
- 1 teaspoon baking powder
- 2 cups berries (fresh or frozen; blueberries, strawberries (diced), raspberries, blackberries, and/or marionberries)
- 1/2 cup assorted fresh berries
- 2 tablespoons powdered sugar (for dusting, optional)
- Cream, half and half, or additional milk (poured over individual servings, if desired)
What You’ll Need (Gear)
- Mixing bowls: For combining the wet and dry ingredients.
- Whisk: To beat the egg and mix well.
- Baking dish: An 8×8 inch or similar size for baking the oatmeal.
- Measuring cups and spoons: For accurate ingredient measurements.
- Spatula: To spread the mixture evenly in the baking dish.
The Method for Overnight Berry Baked Oatmeal

Step 1: Prepare the Base Mixture
In a large mixing bowl, combine the oat milk, egg, maple syrup, and vanilla extract. Whisk until well blended and the egg is fully incorporated.
Step 2: Add the Dry Ingredients
Next, add the rolled oats and baking powder to the wet mixture. Stir until all the oats are evenly coated.
Step 3: Incorporate the Berries
Gently fold in the berries—both the 2 cups of your chosen berries (fresh or frozen) and the additional 1/2 cup of assorted fresh berries. Be careful not to smash the berries; you want to keep them intact for a lovely texture.
Step 4: Assemble and Refrigerate
Pour the oatmeal mixture into a greased baking dish, spreading it evenly. Cover with plastic wrap or a lid, and place it in the refrigerator overnight. This step allows the oats to soak up the liquid, resulting in a creamy, delicious bake.
Step 5: Bake in the Morning
Preheat your oven to 350°F (175°C). Remove the oatmeal from the refrigerator and let it sit at room temperature for about 10 minutes. Bake for 30-35 minutes or until the top is golden brown and the oatmeal is set.
Step 6: Serve and Enjoy!
Once baked, let it cool slightly before dusting with powdered sugar if desired. Serve warm, with a drizzle of cream, half and half, or additional milk poured over individual servings for added creaminess.
Variations by Season

- Spring: Substitute in fresh strawberries, raspberries, and cherries.
- Summer: Use a mix of blueberries, blackberries, and peaches for a tropical twist.
- Fall: Incorporate diced apples and pumpkin spice for a cozy autumn flavor.
- Winter: Try frozen mixed berries or cranberries for a tart kick.
What Not to Do
- Do not skip the soaking time overnight; it’s essential for the best texture.
- Avoid using instant oats; they won’t provide the same chewy texture.
- Don’t overcrowd the baking dish; leave some space for the oatmeal to rise during baking.
- Refrain from overbaking, as it can dry out the oatmeal.
Best Ways to Store
Leftover Overnight Berry Baked Oatmeal can be stored in an airtight container in the refrigerator for up to 5 days. Reheat individual servings in the microwave or oven until warmed through. For longer storage, you can freeze portions in freezer-safe containers for up to three months. Just thaw in the refrigerator overnight before reheating.
Common Questions
Can I make this oatmeal vegan?
Yes! Simply replace the egg with a flax egg (1 tablespoon flaxseed meal mixed with 3 tablespoons water) or an equivalent egg replacer, and ensure your milk is plant-based.
Can I use steel-cut oats instead of rolled oats?
Steel-cut oats are denser and will not yield the same creamy texture. If you prefer them, you may need to adjust the liquid and cooking time to accommodate their longer cooking needs.
What can I add for extra flavor?
Consider adding spices like cinnamon or nutmeg, or even a handful of nuts or seeds for an added crunch. A dollop of yogurt on top can also enhance flavor and texture.
How can I make this a meal prep option?
This recipe is a great meal prep option! Simply double the ingredients and bake in a larger dish, then portion into containers for quick breakfast throughout the week.
One Pan, More Ideas
- Sally’s Baking Addiction – Check out her delicious baked goods.
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- Minimalist Baker – Discover simple, quick recipes with minimal ingredients.
Before You Go
With its hearty texture and fruity flavor, Overnight Berry Baked Oatmeal is destined to become a breakfast favorite in your home. It’s perfect for those who crave convenience without sacrificing quality. Enjoy it as is, or customize it to suit your tastes and the seasons. Whichever way you choose, you’re sure to love the warm, comforting embrace of this delicious dish. So, gather your ingredients tonight, and wake up to a delightful breakfast that makes your mornings easier and tastier!

Overnight Berry Baked Oatmeal
Ingredients
Equipment
Method
- In a large mixing bowl, combine the oat milk, egg, maple syrup, and vanilla extract. Whisk until well blended and the egg is fully incorporated.
- Next, add the rolled oats and baking powder to the wet mixture. Stir until all the oats are evenly coated.
- Gently fold in the berries—both the 2 cups of your chosen berries (fresh or frozen) and the additional 1/2 cup of assorted fresh berries. Be careful not to smash the berries; you want to keep them intact for a lovely texture.
- Pour the oatmeal mixture into a greased baking dish, spreading it evenly. Cover with plastic wrap or a lid, and place it in the refrigerator overnight.
- Preheat your oven to 350°F (175°C). Remove the oatmeal from the refrigerator and let it sit at room temperature for about 10 minutes. Bake for 30-35 minutes or until the top is golden brown and the oatmeal is set.
- Once baked, let it cool slightly before dusting with powdered sugar if desired. Serve warm, with a drizzle of cream, half and half, or additional milk poured over individual servings for added creaminess.
Notes
- Store leftovers in an airtight container in the refrigerator for up to 5 days.
- Reheat individual servings in the microwave or oven until warmed through.
- For longer storage, freeze portions in freezer-safe containers for up to three months.
