This blueberry baked oatmeal is a wholesome breakfast the whole family will enjoy.
Healthy blueberry baked oatmeal
Bursting with juicy blueberries, warm vanilla, and hearty rolled oats, this blueberry oatmeal casserole is a nourishing, comforting way to start the day. It’s filling, simple to prepare, and perfect for feeding a crowd or serving overnight guests. Leftovers slice neatly and freeze well, making quick breakfasts or snack bars easy to grab when mornings are busy.
This recipe is naturally dairy free and can be made vegan by swapping water for eggs. It’s adaptable—try different mix-ins below to keep the flavor fresh.
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5 flavor variations
Blueberry Lemon: Add two teaspoons of lemon zest to brighten the dish.
High Protein: Replace up to 1/2 cup of the oats with 1/2 cup of plain or flavored protein powder.
Chocolate Chip Cookie: Fold in 1/2 cup of semi-sweet, dark, or mini chocolate chips before baking or scatter them on top.
Ginger Cardamom: Add 1/4 teaspoon each ground cardamom and ground ginger with the cinnamon, and stir in a handful of chopped toasted pecans.
Coconut: Use 1/3 cup canned coconut milk instead of oil or nut butter, and stir in up to 1/2 cup shredded coconut or sprinkle coconut shreds on top before baking.
If you prefer individual portions, this batter also works for baked oatmeal cups or muffins.
Ingredients for the best blueberry baked oatmeal
Key ingredients include rolled oats, blueberries (fresh or frozen), mashed banana, pure vanilla extract, a sweetener, salt, cinnamon, and an optional binding fat like nut butter or oil. Eggs can be used for structure, or replace them with water for a vegan version.
You can substitute quick oats for rolled oats, but steel-cut or instant oats are not recommended. For gluten free, choose certified gluten-free oats or use rolled quinoa flakes as a swap.
Nut butters (almond, cashew) or coconut oil add richness; omit them and increase the water for a lower-fat, oil-free option. Sweeteners that work well include pure maple syrup, honey, or agave.
Use ripe bananas for best flavor and sweetness—bananas with some brown on the peel work well, and thawed frozen bananas are fine too.
Also try these Healthy Blueberry Muffins
Blueberry baked oats without banana
If you need a banana-free version, replace the 3 cups mashed banana with equal amounts of applesauce, Greek yogurt, canned pumpkin puree, mango puree, or blended sweet potato. For most substitutes (except mango), increase the sweetener to 1/2 cup and reduce the water to 1/3 cup to balance sweetness and moisture. Mango puree usually provides enough natural sweetness that extra sweetener isn’t necessary.
Still craving blueberries? Try a Blueberry Crisp
Fresh or frozen blueberries?
Either fresh or frozen blueberries work. If using frozen, fully thaw them first and blot away excess moisture with paper towels to avoid a soggy bake. You can swap up to half the blueberries for diced strawberries, cherries, raspberries, blackberries, or sliced banana if you like mixed fruit flavors.
Baked blueberry oatmeal recipe video
Watch the step-by-step recipe video above
The video shows one cup of blueberries on top, but doubling or tripling the berries delivers even more flavor—there’s no such thing as too many blueberries!
How to make the blueberry breakfast recipe
Preheat the oven to 350°F (175°C). Grease a 9×13-inch rectangular baking pan or line it with parchment paper and set aside.
In a large bowl, stir together the rolled oats, salt, and cinnamon. Add the mashed banana, vanilla extract, sweetener, nut butter or oil, and eggs or water; whisk until combined. Gently fold in all but about 1/2 cup of the blueberries, reserving those to press on top.
Spread the batter evenly in the prepared pan, press the remaining berries into the top, and bake on the center rack for 40 minutes. Remove from the oven and serve hot, or let cool completely to slice into bars—cooling helps the bake firm up for neat squares.
Store leftovers in the refrigerator for up to five days and reheat as needed. Sliced bars freeze well in an airtight container for up to three months; thaw and warm before serving.
Nutrition and health benefits
This recipe delivers protein and fiber in a low-calorie breakfast option. Blueberries are antioxidant-rich and provide vitamin C, vitamin K, and manganese, while bananas add potassium and extra fiber. Depending on your choices (eggs or water, nut butter or oil), the bake can be low-fat, egg-free, oil-free, gluten-free, nondairy, and cholesterol-free.
This blueberry baked oatmeal is adapted from a basic baked oatmeal base and a brownie baked oatmeal version. It’s simple, flexible, and easy to make ahead for busy mornings.
Blueberry Baked Oatmeal
Ingredients
- 4 cups rolled oats
- 3 cups mashed banana (or see banana-free substitutions)
- 1/3 cup nut butter or oil, or additional water
- 1/3 cup pure maple syrup (or agave or honey)
- 1 tsp salt
- 1/2 tsp cinnamon
- 2 tsp pure vanilla extract
- 2 eggs (or 1/2 cup water for vegan)
- 4 cups blueberries
Instructions
- Preheat the oven to 350°F. Grease a 9×13-inch pan or line it with parchment paper.
- In a large bowl, stir together the rolled oats, salt, and cinnamon.
- Add mashed banana, vanilla, sweetener, nut butter or oil, and eggs or water. Whisk until blended.
- Carefully stir in 2 cups of blueberries, reserving the rest to press on top.
- Spread the mixture evenly in the prepared pan and press the remaining berries on top.
- Bake for 40 minutes. Serve hot or let cool to slice into bars. Store refrigerated up to five days or freeze for up to three months.
Notes
Use substitutions listed earlier for banana-free or vegan versions. Leftover baked oats can be repurposed into cookies or breakfast bars.
More Easy Breakfast Ideas
Applesauce Muffins
Easy Cinnamon Rolls
Tofu Scramble
Vegan French Toast
Strawberry Smoothies
Baked Apple Cider Donuts
Blueberry Banana Bread