Healthy Baked Oatmeal with Mixed Berries
Soft and cake-like in the middle with golden edges, this berry baked oatmeal feeds a crowd or covers a whole week of breakfasts.
Baked oatmeal sits somewhere between a bowl of oats and a soft breakfast cake. It is mixed in one bowl, baked in a single dish, and cut into squares that reheat beautifully all week.
Mashed banana and a modest amount of maple syrup sweeten this version, while berries add bursts of tartness. Because the oats bake in milk, they turn soft and custardy in the center with lightly crisp edges.
At a glance: this healthy baked oatmeal with mixed berries serves 6, needs about 10 min of hands-on prep and 40 min of cooking, and provides roughly 290 calories and 8 g of protein per serving. It is naturally vegetarian.
Why you'll love this recipe
- One bowl and one baking dish
- Feeds 6 or covers a week of breakfasts
- Sweetened with fruit and a little maple
- Works with fresh or frozen berries
About this baked oatmeal
Baked oatmeal is a traditional breakfast in Pennsylvania Dutch kitchens, where oats, milk, eggs and a little sweetener were baked in a dish to feed a crowd. It sits somewhere between a bowl of porridge and a soft breakfast cake, and it can be cut into squares and eaten warm or cold.
This healthier version uses mashed banana and a modest amount of maple syrup instead of lots of sugar, and is studded with mixed berries for color and tartness. The oats soak up the milk as they bake, giving a soft, custardy middle with lightly crisp edges.
It is ideal for meal prep, brunch with friends and busy families. Mix it the night before, bake it in the morning, and you have breakfast for the whole week.
Ingredient notes and substitutions
- Rolled oats. Old-fashioned rolled oats give the best texture. Quick oats make a softer, cake-like result. Use certified gluten-free oats if needed.
- Banana. Mashed ripe banana sweetens and binds the oatmeal. Unsweetened applesauce or pumpkin puree are good substitutes.
- Eggs. Eggs help the oatmeal set into sliceable squares. For an egg-free version, use two flax eggs and expect a slightly softer texture.
- Milk. Dairy milk or any unsweetened plant milk works. Oat and soy milk give the creamiest result.
- Berries. Use fresh or frozen berries, or a mix. Blueberries hold their shape well; raspberries melt into jammy pockets.
- Nuts. Pecans or walnuts add crunch on top. For a nut-free version, use pumpkin seeds or sunflower seeds.
Equipment you'll need
- An 8x8-inch (20x20 cm) baking dish
- Two mixing bowls and a whisk
- A fork or potato masher for the banana
- A sharp knife for slicing
How to make it, step by step
Combine the dry ingredients
Stir the oats, baking powder, cinnamon and salt together first so the leavening is evenly distributed and every bite rises the same way.
Whisk the wet mixture smooth
Mash the banana well before adding the eggs, milk, syrup, oil and vanilla. Any large banana chunks will create dense, wet spots in the finished oatmeal.
Fold in the berries gently
Combine wet and dry, then fold in most of the berries. Overmixing can crush the fruit and turn the mixture purple, which is harmless but less attractive.
Bake until set in the middle
Scatter the remaining berries and nuts on top and bake until golden and set. The center should feel firm when lightly pressed. Rest for 10 minutes before slicing so the squares hold together.
Recipe
Healthy Baked Oatmeal with Mixed Berries
American · Breakfast · Vegetarian
Ingredients
- 2 cups (180 g) old-fashioned rolled oats
- 1 1/2 teaspoons baking powder
- 1 teaspoon ground cinnamon
- 1/4 teaspoon salt
- 1 large ripe banana, mashed
- 2 large eggs
- 1 3/4 cups (420 ml) milk of choice
- 1/4 cup (60 ml) maple syrup
- 2 tablespoons melted coconut oil or butter
- 1 teaspoon vanilla extract
- 1 1/2 cups (225 g) mixed berries, fresh or frozen
- 1/4 cup (30 g) chopped pecans or walnuts
Instructions
- Prepare. Preheat the oven to 375°F (190°C) and grease an 8x8-inch (20x20 cm) baking dish.
- Mix dry ingredients. In a large bowl, stir together the oats, baking powder, cinnamon and salt.
- Mix wet ingredients. In another bowl, whisk the mashed banana, eggs, milk, maple syrup, melted coconut oil and vanilla until smooth.
- Combine. Pour the wet mixture into the dry ingredients and stir to combine. Fold in two thirds of the berries.
- Top and bake. Pour into the baking dish, scatter the remaining berries and the nuts on top, and bake for 35 to 40 minutes, until golden and set in the center.
- Rest and serve. Let it cool for 10 minutes before slicing. Serve warm with a spoonful of Greek yogurt or a splash of milk.
Nutrition (estimated, per serving)
Nutrition values are estimates calculated from typical ingredient data and will vary with the exact products and quantities you use.
Tips for success
- The center should feel set when lightly pressed. If it jiggles, give it 5 more minutes.
- Do not thaw frozen berries first; add them frozen and bake for a few extra minutes.
- For a firmer, sliceable texture, chill the baked oatmeal before cutting into squares.
Troubleshooting
- The middle is wet. Bake for 5 to 10 minutes more, especially when using frozen berries, which release extra liquid.
- The oatmeal is dry. It was overbaked or the oats were measured generously. Serve with a splash of warm milk and reduce the baking time next time.
- The squares fall apart. Let the oatmeal cool longer before slicing, or chill it overnight for clean squares.
- It is not sweet enough. Use riper bananas or drizzle each portion with a little maple syrup when serving.
Variations
- Apple cinnamon. Replace the berries with 2 diced apples and add 1/4 teaspoon nutmeg.
- Peanut butter banana. Add 1/4 cup peanut butter to the wet mix and top with banana slices.
- Dairy-free. Use oat or almond milk and coconut oil.
What to serve with it
Serve baked oatmeal warm with a spoonful of Greek yogurt and a drizzle of maple syrup, or pour a little warm milk over each square for a cozy, porridge-like bowl.
For brunch, serve it straight from the baking dish with a bowl of fresh berries, yogurt and toasted nuts so everyone can add their own toppings.
Make ahead and storage
Assemble the baked oatmeal in the dish the night before, cover and refrigerate, then bake it in the morning, adding 5 to 10 minutes to the baking time. Baked squares also freeze beautifully when wrapped individually.
Store covered in the fridge for up to 5 days, or freeze individual squares for up to 3 months. Reheat in the microwave for 45 to 60 seconds.
Is it healthy?
Baked oatmeal is made mostly from whole-grain oats and fruit, which provide fiber and slow-release energy. Using banana for sweetness keeps added sugar modest compared with many bakery breakfasts.
It is relatively low in protein on its own, so pair it with Greek yogurt, a glass of milk or an egg if you want it to keep you full for longer.
Nutrition information is an estimate for general guidance only and is not medical or dietary advice.
Frequently asked questions
Can I make baked oatmeal the night before?
Yes. Assemble everything in the baking dish, cover and refrigerate overnight. Bake in the morning, adding 5 to 10 minutes to the baking time.
Can I use quick oats?
You can, but the result will be softer and more cake-like. Rolled oats give the best texture.
Is baked oatmeal healthy?
It is a fiber-rich breakfast made from whole grains and fruit with modest added sugar. Pair it with yogurt for extra protein.
Can I make baked oatmeal without eggs?
Yes. Use two flax eggs or 1/2 cup of applesauce. The texture will be softer and more spoonable.
Can I use steel-cut oats?
Steel-cut oats need much more liquid and time. Stick with rolled oats for this recipe.
How do I reheat baked oatmeal?
Microwave a square for 45 to 60 seconds, or warm it in a 300°F (150°C) oven for 10 minutes.
Can I double the recipe?
Yes. Use a 9x13-inch (23x33 cm) dish and add 5 to 10 minutes to the baking time.
Can I add protein powder to baked oatmeal?
Yes. Replace about 1/4 cup of the oats with a scoop of vanilla protein powder and add a splash of extra milk so the mixture is not too dry.
Can I make baked oatmeal in a muffin tin?
Yes. Divide the mixture between 12 greased muffin cups and bake for 20 to 25 minutes. They make perfect grab-and-go breakfasts.
Which berries work best?
Blueberries are the most reliable because they keep their shape. Raspberries and blackberries give jammy pockets, and chopped strawberries can be used if they are not too juicy.
Why is my baked oatmeal gummy?
Usually it was cut while still hot or slightly underbaked. Let it rest for at least 10 minutes and check that the center is firm before taking it out of the oven.
Final thoughts
This healthy baked oatmeal with mixed berries takes about 50 min from start to finish and serves 6. It is vegetarian, and it is easy to adapt with the variations above. If you make it, adjust the seasoning to your taste and make a note of what you changed, so the next batch is exactly how you like it. Looking for more ideas? Browse all our breakfast recipes or the full recipe index.