Blueberry Banana Baked Oatmeal

$4.18 recipe / $0.52 serving
by Beth - Budget Bytes
4.81 from 42 votes
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Will I ever get tired of baked oatmeal? Probably not. It’s easy, cheap, deceptively filling, and I can cook it one day and then eat it throughout the rest of the week.

I love this version because I barely had to add any extra sugar thanks to the super sweet bananas. I used only 1/4 cup for the entire batch, and honestly, I probably could have cut that down to 2 Tbsp. Bananas are fantastic. The frozen blueberries were delightfully tart against the sugary bananas, which made them a perfect mate. If you’re lucky enough to have fresh blueberries, this recipe is a great way to use them up!

If you’ve got a few extra bucks, adding some nuts would be a nice texture contrast (try walnuts or almonds)!

Blueberry Banana Baked Oatmeal

Top view of a bowl of Blueberry Banana Baked Oatmeal

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Blueberry Banana Baked Oatmeal

4.81 from 42 votes
Fresh fruit and rich, custardy oats make this baked oatmeal a filling and flavorful "fix ahead" breakfast. Just heat and eat each morning!
Blueberry banana oatmeal topped with fresh blueberries.
Servings 6 -8
Prep 15 minutes
Cook 45 minutes
Total 1 hour

Ingredients

  • 1.5 cups mashed bananas (about 3 bananas) ($0.75)
  • 2 large eggs ($0.50)
  • 1/4 cup white sugar ($0.04)
  • 3/4 tsp vanilla extract ($0.21)
  • 1/2 tsp salt ($0.02)
  • 3/4 tsp baking powder ($0.03)
  • 2 cups milk ($0.50)
  • 2.5 cups old fashioned oats ($0.43)
  • 8 ounces frozen blueberries ($1.70)

Instructions 

  • Preheat your oven to 375 degrees. Mash the bananas in a measuring cup, starting with two or three and adding more until you have 1.5 cups of banana mash.
  • Combine the banana mash in the large bowl with the eggs, sugar, vanilla, salt, and baking powder. Whisk to combine. Add the milk and whisk again until smooth.
  • Stir in the dry old-fashioned oats. Lastly, stir in the frozen blueberries (keeping them frozen and stirring them in last helps prevent the entire mix from turning purple). Spray an 8×8 inch baking dish with non-stick spray and then pour in the oat mixture.
  • Bake in the preheated 375 degree oven and bake for about 45 minutes or until the top is golden brown and the center is no longer wet to the touch.

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Notes

Serve warm or refrigerate until ready to eat. These oats can be quickly reheated in the microwave each morning for a quick, filling breakfast.

Nutrition

Serving: 1ServingCalories: 305.87kcalCarbohydrates: 53.05gProtein: 9.98gFat: 6.97gSodium: 306.78mgFiber: 5.92g
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Top view of a bowl of Blueberry Banana Baked Oatmeal with whole dish of oatmeal and a cup of coffee in the background

Step By Step Photos

mashed bananas in measuring cup
Mash the bananas with a fork, starting with just a couple and adding more until you have 1.5 cups of banana mash. Try not to leave any large chunks. (last time it took me 4 medium bananas, this time only 3).

custard ingredients in mixing bowl
Add the banana mash to a bowl along with the eggs, vanilla, sugar, baking powder, and salt. Whisk until smooth.

milk added to custard ingredients in mixing bowl and whisked with whisk
Next, add the milk and whisk again. It’s a lot easier to make a smooth, cohesive mixture if you whisk the other ingredients prior to adding the milk. That’s why it’s done in two steps.

dry oats added into. mixing bowl with other ingredients
Stir in the dry oats. It’s easier to stir them in with a large spoon than a whisk, but I didn’t feel like dirtying another utensil.

package of frozen blueberries
I love having frozen blueberries on hand. They’re a great addition to many dishes, are less expensive than fresh, and keep for quite a while in the freezer. I used half a bag for this recipe (and used the rest for my smoothie packs).

oatmeal mixture poured into baking dish, ready to bake
Keep the blueberries frozen until you add them so they don’t bleed purple color throughout the oatmeal. Adding them at the very end helps this as well. Pour the blueberry oat mixture into an 8×8 inch casserole dish that has been sprayed with non-stick spray.

baked blueberry banana oatmeal in baking dish on stove top
Bake for about 45 minutes at 375 degrees or until the top is golden brown and no longer wet to the touch in the center. I baked this oatmeal at 25 degrees higher than my other baked oatmeals to compensate for the little blueberry ice cubes floating around in it. It worked out well.

Bowl of Blueberry Banana Baked Oatmeal with a cup of coffee in the background
I like to eat mine with a little bit of cold milk poured over top. This makes for a very fast, very hearty breakfast every morning of the week!

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Comments

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  1. Hi! This recipe looks delicious! I just have a quick question — I’m not too familiar with baked oatmeal, and I was wondering if I could double the recipe and put it in a 9×13 without messing up the baking temp/time? I think it would be thicker in the 9×13 and I don’t want to scorch the top to make the middle the right consistency. :-) If you have any tips, I’d really appreciate it! Thank you!

  2. I LOVE baked oatmeal! I made a few tweaks to this recipe because I didn’t have very many blueberries, but I wanted to make it so badly! Here is what I did and it’s amazing!:
    1. I left some of the banana chunks in it instead of mashing it completely
    2. I added fresh strawberries chopped up to even out the lack of blueberries
    3. I used about 2 tablespoons of brown sugar instead of white because I prefer brown with my oatmeal.. but either one I think is good.
    4. I saved about ยผ c of oats and I mixed it with about a teaspoon of butter with a tablespoon of brown sugar to sprinkle on top while it was baking
    5. I put the mixture in muffin tins instead of an 8×8 inch pan because mine was in use. I liked this because it helped me to not get too carried away with eating it so fast and I froze about half of them so I could take out one at a time when I wanted it again!
    I canโ€™t wait to try the chocolate one next!!!!

  3. Kimberly – The milk is added in Step 2 (or the third photo in the step by step photos). You can find me on Facebook at facebook.com/budgetbytes1 or by clicking the Facebook icon at the top right hand corner of this page. I do have a book in the making, but it’s in the very preliminary stages so I don’t have any details yet :) But, follow me on Facebook for updates!

  4. JoAnna – I think it’s best to bake it, then freeze it in single serving portions. That way, you can just reheat it in the microwave and you don’t have to thaw the entire thing. I’m not sure how well it would work if frozen before baking. And remember, always refrigerate before freezing. It’s best for the items to be cold before they go into the freezer :)

  5. If I was going to make this to freeze and eat at a later date would I bake it in the oven then freeze it? or could I mix it all up and put it in the freezer until a later time then bake it? doing it either way how long do you think it would hold up in the freezer? and would I bake(or re-bake) it at the same temp and amount of time?

    sorry so many questions, I’m just preparing to start doing freezer meals and would like to have this as a breakfast option :)

  6. Just baked oatmeal using both the recipes as inspiration…used peaches n blueberries in the bottom,bananas for moisture, no sugar at all and just a pinch of baking powder as I was out of baking soda…baked for almost 50 minutes and it turned out awesome,hubby loved it!!!

  7. I love your site, and this receipe! The picture looks mouthwatering! I infact have some fresh blueberries and bananas that need to be used up pretty quick. I will be making this tonight and can’t wait to eat it in the morning. Thanks!

  8. I made this lastnight.. used mixed berries instead of just blueberries and silk soymilk… very tasty.. love your recipes beth.

  9. Just made this for breakfast. I used pureed frozen bananas, because that’s what I had on hand, and I added 1 tsp pumpkin pie spice. Delicious! Looking forward to trying the chocolate banana baked oatmeal next.