I started making this Peanut Butter Banana Baked Oatmeal Recipe on a random Sunday when I had three overripe bananas sitting on my counter, and it’s been in my breakfast rotation ever since. I love that I can throw everything into one bowl, pour it into a dish, and walk away while it bakes into something that tastes like dessert but works just as well as a weekday breakfast.Â
My kids ask for it by name now, which almost never happens with anything I make that’s actually good for them. It comes together in under 40 minutes, and I usually double the batch so I have breakfast covered for the whole week.
If you’ve been looking for a baked oatmeal banana healthy enough for busy mornings but comforting enough to feel like a treat, this is the one I keep coming back to.
Cooking Time
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Total Time: 35 minutes
Ingredients
Here’s everything I use to make this peanut butter banana baked oatmeal recipe, along with a quick note on why each one matters.
- 1 ½ cups quick cooking oats – these give the softest, most tender bite; old-fashioned oats work too but turn out chewier
- 1 teaspoon baking powder – helps the oatmeal rise slightly so it doesn’t bake up dense
- ½ teaspoon sea salt – balances the sweetness and makes the banana and peanut butter flavors pop
- 1 teaspoon ground cinnamon – adds warmth without needing extra sugar
- 2 very ripe bananas, mashed – the riper and spottier they are, the sweeter and more flavorful your oatmeal will be
- ¼ cup creamy peanut butter – stir it into the banana while it’s still a bit warm from mashing for the smoothest mix
- 1 teaspoon vanilla extract – rounds out the flavor and makes it taste a little more like a treat
- ¼ cup pure maple syrup – this is the main sweetener, so don’t skip it even if your bananas are super ripe
- 1 large egg, lightly beaten – gives the oatmeal structure so it slices into clean squares
- ¾ cup whole milk – any milk works, but whole milk gives the richest texture
- ¼ cup creamy peanut butter, for the topping – warm it slightly so it drizzles instead of clumping on top
Note: this recipe serves 9.
Equipment You Need
- Large mixing bowl – for mashing the bananas and combining the batter
- Measuring cups and spoons – for accurate ingredient amounts
- 9×9 inch baking dish – the right size for a batch that bakes evenly and slices into neat squares
- Rubber spatula or wooden spoon – for stirring and scraping every bit of batter into the pan
How to Make Peanut Butter Banana Baked Oatmeal Recipe?
This whole recipe comes together in one bowl, so there’s barely any cleanup involved. I’ll walk you through each stage below so your oatmeal turns out just as good as mine does every time.
Preheat and Prep the Pan
Start by preheating your oven to 350 degrees Fahrenheit. While it heats, grease your 9×9 inch baking dish with butter or a light coating of cooking spray. Getting this step done first means you can pour your batter in the moment it’s ready.
Mash the Bananas
In your large mixing bowl, mash the two ripe bananas until they’re mostly smooth with just a few small lumps left. I use a fork for this, though a potato masher works well too if your bananas are extra firm.
Stir in the Peanut Butter
Add the peanut butter directly into the mashed banana and stir until it’s fully blended in. The warmth from freshly mashed banana actually helps loosen the peanut butter, so this step goes faster than you’d expect.
Add the Wet Ingredients
Pour in the vanilla extract, maple syrup, and lightly beaten egg. Stir everything together until the mixture looks smooth and uniform. This is the base that holds your baked oatmeal together once it’s in the oven.
Mix in the Milk
Stir the milk into your wet mixture until it’s fully incorporated. The batter will look thin at this point, which is exactly what you want before the oats go in.
Combine the Dry Ingredients
Add the quick cooking oats, baking powder, sea salt, and cinnamon straight into the bowl. Stir until every oat is coated and there are no dry pockets left at the bottom of the bowl.
Pour and Top
Pour the batter into your prepared baking dish and spread it into an even layer. If you’d like, drizzle the extra peanut butter across the top now so it bakes into a slightly caramelized swirl.
Bake Until Set
Bake for 25 minutes, or until the top springs back lightly when touched and the edges turn a light golden brown. Let it cool for a few minutes before slicing into squares and serving.
Additional Tips for Making This Recipe Better
I’ve made this peanut butter banana baked oatmeal recipe more times than I can count, and these are the small things that make a real difference for me.
- I always use bananas that are heavily spotted or even a little black, since they blend in smoother and add more natural sweetness
- I let my peanut butter come to room temperature before stirring it into the banana, which keeps the batter from getting clumpy
- I bake mine in a glass dish because I find the edges brown more evenly than in a metal pan
- I double the recipe and use a 9×13 dish whenever I know I’ll want leftovers for the week
- I let it cool for a full 10 minutes before cutting, since it firms up and holds its shape much better once it’s rested
Common Mistakes to Avoid
Here are a few mistakes I’ve personally made while perfecting this recipe, plus how I’ve learned to avoid them.
- Using bananas that aren’t ripe enough – I’ve tried this with yellow, firm bananas and the oatmeal turns out noticeably less sweet and flavorful
- Skipping the greasing step on the pan – I once forgot this and spent way too long trying to scrape squares out cleanly
- Overbaking it – I like to pull mine the second the center springs back, since a few extra minutes can dry it out
- Not stirring the oats in fully – I’ve had bites with dry oat pockets when I rushed this step, so I always give it an extra stir
- Cutting it too soon – I know it’s tempting, but slicing right out of the oven makes it fall apart instead of holding a clean square
How to Serve Peanut Butter Banana Baked Oatmeal?
I like serving this warm, straight from the pan, with an extra drizzle of peanut butter or maple syrup melting over the top. A few slices of fresh banana and a light dusting of cinnamon make it look just as good as it tastes, especially if you’re serving it for a weekend brunch.
For a heartier plate, I’ll add a spoonful of Greek yogurt on the side or crumble some walnuts over the top for crunch. It also holds up well served cold straight from the fridge, which makes it an easy grab-and-go option on school or work mornings.
For a breakfast spread with a few different sweet options, you can also enjoy an Easy Lemon Pop Tart Recipe alongside the baked oatmeal when you’re serving family or guests.Â
Variations
This recipe is easy to switch up depending on what you’re craving or what you have on hand.
- Peanut butter banana baked oatmeal bars – bake the batter in a lined pan and slice into bars once cooled for an easy on-the-go version
- Chocolate chip version – fold in a handful of mini chocolate chips before baking for a dessert-like twist
- Protein-boosted batch – stir in a scoop of vanilla protein powder along with a splash of extra milk for banana baked oats high protein
- Dairy-free option – swap the whole milk for almond milk or oat milk with no change to the texture
- Nut-free swap – use sunflower seed butter in place of peanut butter if you’re serving a nut-free crowd
- Muffin-style baking – pour the batter into a muffin tin and bake for 15 to 20 minutes for individual portions
- No-egg version – for baked oats with banana no egg, replace the egg with a flax egg made from one tablespoon of ground flaxseed mixed with two and a half tablespoons of warm water
- For another sweet breakfast option, a Cream Cheese Pop Tart Recipe can be served alongside these baked oats when you want a little more variety on the table.Â
Nutritional Information
Here’s a quick look at what’s in each serving of this baked oatmeal, based on a batch cut into 9 squares.
- Calories: approximately 125 per serving
- Protein: approximately 5 grams per serving
- Carbohydrates: approximately 17 grams per serving
- Fat: approximately 5 grams per serving
Make Ahead and Storage
Storage: Once it’s cooled to room temperature, store leftover squares in an airtight container in the refrigerator. It stays fresh for up to 5 to 7 days, which makes it one of my go-to options for meal prep.
Freezing: Cut the cooled oatmeal into individual squares and freeze them in a single layer before transferring to an airtight container or freezer bag. It keeps well in the freezer for up to 2 months.
Reheating: Warm a piece in the microwave for about 20 to 30 seconds if it’s refrigerated, or closer to a minute if it’s coming straight from frozen. You can also reheat it in a covered dish in a low oven if you’re warming up a larger batch at once.
Why You’ll Love This Recipe
This peanut butter banana baked oatmeal recipe has earned its permanent spot in my breakfast rotation for a few solid reasons.
- It’s simple to make – everything comes together in one bowl with no mixer or fancy equipment required, so cleanup is quick and easy
- It’s naturally sweetened – the ripe bananas and maple syrup mean there’s no refined sugar needed, and it still tastes like a treat
- It’s endlessly customizable – whether you want it dairy-free, nut-free, or turned into 3 ingredient banana peanut butter oatmeal muffins, it adapts easily
- It’s meal-prep friendly – I can make one batch on Sunday and have breakfast covered for most of the week
- It keeps everyone full – between the oats, peanut butter, and egg, this has enough protein and fiber to actually hold you over until lunch
FAQs
Can I use old-fashioned oats instead of quick oats?
Yes, old-fashioned oats work fine, though the texture comes out a bit chewier compared to quick oats. If you want that same soft texture, pulse the oats once or twice in a blender before using them.
Can I make this recipe without eggs?
Yes, you can make baked oats with banana no egg by using a flax egg in its place. Just mix one tablespoon of ground flaxseed with two and a half tablespoons of warm water and let it sit for a few minutes before adding it in.
How do I make this a 3 ingredient banana baked oats version?
For a stripped-down take, mash the bananas with peanut butter and oats only, skipping the extra sweetener and spices. It won’t rise quite as much, but it’s a quick option when you’re short on ingredients.
Can I double this recipe?
Yes, simply double every ingredient and bake it in a 9×13 inch pan. You’ll want to add a few extra minutes to the bake time since the pan is deeper.
Is this recipe good for meal prep?
Absolutely. I make a batch at the start of the week, slice it into squares, and store it in the fridge so breakfast is ready in seconds every morning.
Peanut Butter Banana Baked Oatmeal Recipe
Ingredients
Method
- Start by preheating your oven to 350 degrees Fahrenheit. While it heats, grease your 9×9 inch baking dish with butter or a light coating of cooking spray. Getting this step done first means you can pour your batter in the moment it’s ready.
- In your large mixing bowl, mash the two ripe bananas until they’re mostly smooth with just a few small lumps left. I use a fork for this, though a potato masher works well too if your bananas are extra firm.
- Add the peanut butter directly into the mashed banana and stir until it’s fully blended in. The warmth from freshly mashed banana actually helps loosen the peanut butter, so this step goes faster than you’d expect.
- Pour in the vanilla extract, maple syrup, and lightly beaten egg. Stir everything together until the mixture looks smooth and uniform. This is the base that holds your baked oatmeal together once it’s in the oven.
- Stir the milk into your wet mixture until it’s fully incorporated. The batter will look thin at this point, which is exactly what you want before the oats go in.
- Add the quick cooking oats, baking powder, sea salt, and cinnamon straight into the bowl. Stir until every oat is coated and there are no dry pockets left at the bottom of the bowl.
- Pour the batter into your prepared baking dish and spread it into an even layer. If you’d like, drizzle the extra peanut butter across the top now so it bakes into a slightly caramelized swirl.
- Bake for 25 minutes, or until the top springs back lightly when touched and the edges turn a light golden brown. Let it cool for a few minutes before slicing into squares and serving.
Notes
- I always use bananas that are heavily spotted or even a little black, since they blend in smoother and add more natural sweetness
- I let my peanut butter come to room temperature before stirring it into the banana, which keeps the batter from getting clumpy
- I bake mine in a glass dish because I find the edges brown more evenly than in a metal pan
- I double the recipe and use a 9×13 dish whenever I know I’ll want leftovers for the week
- I let it cool for a full 10 minutes before cutting, since it firms up and holds its shape much better once it’s rested
