Baked Blueberry Oatmeal with Banana

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This baked blueberry oatmeal is gluten-free, uses fresh blueberries, and can feed six people in no time. It's an easy make-ahead breakfast.


Making baked oatmeal is one of the best way to make oatmeal for meal prep or to feed a crowd. This easy baked oat dish with blueberries, bananas, and cinnamon is a delicious way to start the day. 

I tend to eat a lot of oatmeal, especially in the colder months when a warm and hearty bowl of oatmeal makes the perfect healthy breakfast.

However, when I have time, my favorite way to make oatmeal is baking it into a recipe, like these jumbo blueberry oatmeal muffins or this baked blueberry oatmeal! I love how the oats bake into what is best described as a soft granola bar packed with some of our favorite flavors: blueberries and bananas.

Not a fan of blueberries or bananas? That's okay! There are many different ways you can change this oatmeal recipe to make it taste completely different each time. After you learn this base recipe, you can change what you add to it and make a different casserole each time, like strawberries or apple cinnamon.

Baked blueberry banana oatmeal cut into squares with rolled oats and blueberries on parchment paper.

Key Ingredients For Baked Blueberry Oatmeal

This recipe uses all whole and fresh ingredients. Here is a bit more information about what you'll need from the store:

  • Bananas: You will want to use ripe bananas for this oatmeal bake. The more ripe the bananas are, the better they will bake in the oatmeal. If you don't have any ripe bananas, look at this comprehensive guide on everything banana!
  • Skim milk: If you are lactose intolerant, use almond or oat milk instead for a non-dairy alternative.
  • Egg: This ingredient is essential because it binds all the ingredients together. A flax or chia egg will also work for a vegan option.
  • Vanilla extract: Try to use real vanilla extract if you have it! It will elevate the flavors of the rest of the ingredients.
  • Honey: I used honey as a sweetener in this recipe to avoid adding in any white sugars. If you don't like or have honey, you can use real maple syrup. This baked blueberry oatmeal bake will still taste amazing!
  • Oats: The type of oats is not crucial because you are baking them. You can use either steel-cut or even quick-cooking oats. If you want to make this recipe gluten-free, make sure to buy gluten-free rolled oats.
  • Spices: I used a combination of salt, baking soda, and cinnamon. It also tastes delicious with a dash of allspice in it too!
  • Blueberries: Either fresh or frozen blueberries are perfect, especially since this is a baked recipe. Other berries can also be added or swapped in.

Note: For a complete list of ingredients and detailed instructions on how to make this baked oatmeal, take a look at the printable recipe card at the bottom of this post!

What To Serve With Baked Blueberry Oatmeal

This is a healthy and filling recipe that is perfect all on its own. If you want to serve something with it, add some fresh fruit and maybe even a few bacon or sausage slices. Don't forget a dollop of fresh whipped cream!

You can also serve this baked oatmeal recipe at brunch. If you do, serve some quiche cupcakes on the side. It will also taste amazing with a blueberry banana smoothie to top it all off!

Recipe Tips And Ideas For Blueberry Banana Oatmeal

Follow these tips to make sure the oatmeal turns out sweet and perfect every single time:

  • This oatmeal tends to stick to baking dishes so, using a cooking spray on the pan will help when you plan to serve. Alternatively, line your baking dish with parchment paper instead!
  • You can add ripe bananas to the oatmeal without baking them, but you will bring out more of their naturally sweet taste if you bake them first.
  • Make sure to fold in the blueberries. This means you add them into the mixture last and very lightly spoon the oatmeal mixture on top of the blueberries. You don't want to break or smash the blueberries because it will turn your entire oatmeal blue.
  • If you prefer thinner oatmeal that tastes like custard, take it out after about 30 minutes. If you like it thicker, then leave it in for 40 minutes. I recommend checking on it after about 30 minutes and see where the baked oatmeal is at in the cooking process.

Baked oatmeal with blueberries and banana cut into squares and being picked up by a hand.

Frequently Asked Questions About The Baked Blueberry Oatmeal Recipe

Here are some questions I frequently get asked about by some readers…

How do you store baked oatmeal?

This keeps well in the fridge, so it makes a great weekend breakfast with leftovers for grab-and-go breakfasts during the week. The best way to store it is in an airtight container in the refrigerator for up to 5 days.

Can I freeze baked oatmeal?

Yes, this is a fantastic freezer meal too! Freeze it in the same pan that you will bake it in (I prefer to use an aluminum pan that comes with a foil lid). This way, you can just pull it out of the freezer the night before and then bake it when you are ready to make breakfast.

How do I make bananas ripen faster?

Since you will be pre-baking the bananas, they don't have to be really ripe, but it does help them have a sweeter taste. The best way to help bananas ripen is to place them in a small paper bag. Within one day, they should be darker and sweeter.

You can also add them to a baking sheet and place them in a 200-degree oven until they turn black. Once they have cooled down, remove the peel and add them to the oatmeal batter.

What are some things I can add to the baked oatmeal?

Mix things up by adding:

  • Nuts
  • Chocolate chips
  • Dried fruit
  • Coconut
  • Chia seeds
  • Flax seeds

There are so many things you can add to this oatmeal. It really is a fantastic starting point for lots of other ideas!

Oatmeal baked with blueberries and bananas stacked on top of a plate.

More Delicious Oatmeal Recipes You'll Love:

The Recipe
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Baked Blueberry Oatmeal with Banana

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  • 2 ripe bananas
  • 1.5 cups skim milk (or unsweetened almond milk)
  • 1 egg
  • 1 tsp. vanilla extract
  • 1/16 tsp salt
  • 1/4 cup honey (or pure maple syrup)
  • 1.5 cups rolled oats
  • 1/2 tsp. baking soda
  • 3/4 tsp. cinnamon
  • 1.5 cups blueberries

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Preheat the oven to 375 degree. Spray a baking dish (8 X 8 for six servings) with cooking spray or cover with parchment. Place the bananas (unpeeled) on a piece of foil and bake for 15 minutes. Remove and once cool, slice. It is fine is they are a bit mushy, in fact they should be soft. You can skip this step for faster prep but cooking the bananas will deepen the flavor and bring out more of their natural sweetness.

Baked bananas being peeled on a board.

In a bowl, mix together the milk, egg, vanilla extract, salt, and honey.

Milk, eggs, honey, vanilla extract, and salt being mixed in a bowl.

In another bowl, mix together the oats, baking soda, and cinnamon.

Rolled oats, baking soda, and cinnamon being mixed together in a bowl.

Add to the milk mixture and stir together. Fold in the blueberries and bananas.

Blueberry banana oatmeal ingredients being mixed together in a bowl.

Pour into the parchment lined baking dish. Bake for 35-40 minutes or until golden brown and cooked through. If you prefer a more custard like (classic oatmeal) consistency, take out at 30 minutes.

Oatmeal being poured into a baking dish lined with parchment paper.
Nutritional Facts
Serving Size: 1 square
Amount Per Serving
Calories 207
Calories from Fat 22
% Daily Value *
Total Fat 3g
Saturated Fat 1g
Monounsaturated Fat 0g
Polyunsaturated Fat 0g
Cholesterol 32mg
Sodium 174mg
Total Carbohydrate 42g
Dietary Fiber 4g
Sugars 23g
Protein 7g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Nutritional Values provided are estimates only and may vary based on the preparation method.

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About the author Meet Kristen McCaffrey
Hi, I’m the cookbook author, recipe developer, and food enthusiast behind Slender Kitchen. I am obsessed with making healthy food that is easy to prepare and absolutely delicious. Meal planning is my secret weapon and I hope I can make meal time easier for you with our tried and tested recipes and foolproof meal plans. Learn More
On Baked Blueberry Oatmeal with Banana
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July 27, 2018 - 06:08
Add a Rating:
Love this! I use frozen blueberries and it turns out great.
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July 27, 2018 - 06:08
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Love this!
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Carole McCann
October 12, 2016 - 12:35
Add a Rating:
I love this recipe. I never liked eating breakfast until I found this recipe. I add some raisins and also chopped nuts for some crunch. Can be made with frozen blueberries, and I don't drain them, their juice makes it more moist. Highly recommend this recipe.
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Jennifer New
January 13, 2016 - 15:27
Add a Rating:
This looks amazing. I don't have any bananas and only frozen berries. I'm not a good baker. Would I need to make an modifications if I used frozen berries??
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Megan Eaton
January 10, 2016 - 08:54
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I do not like bananas and blueberries were super expensive at the grocery store. But I bought raspberries and the recipe turned out well. Next time I will add another five minutes to the cook time - came out just a touch runny this first time.
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