Soft and chewy, these banana oatmeal bars are super easy to make with just a handful of pantry items. They're the perfect make-ahead, grab-n-go breakfast, snack, or dessert.

Banana Oatmeal Bars
One of the most popular recipes on my blog is this 3 ingredient cookie. It's absolutely amazing just how much yumminess can result from this trio: peanut butter, mashed bananas, and oatmeal.
So these healthy oatmeal bars were bound to happen! You're going to love this one-bowl recipe made with simple ingredients and no added sugar.
And if you are looking for a no bake version, try these oatmeal balls!
Related: Easy Oatmeal Recipes for Babies and Kids
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Ingredients

I am highlighting just the ones that need further explanation. The complete list is in the recipe card below.
- Rolled oats (old-fashioned oats) - while quick oats will work too, the texture will be much softer.
- Overripe bananas - The more ripe they are, the sweeter and more moist the bars will be. So grab ones with lots of brown spots.
- Creamy peanut butter - Helps bind the bars together and adds protein, healthy fats, and a delicious nutty flavor. Smooth, natural style works best. You can also use any nut butter, like almond butter or cashew butter, or seed butter, like sunflower butter.
- Ground flax seeds - I recommend purchasing whole flaxseeds and grinding them yourself (I love to use my coffee grinder for this). That's because once ground, they go rancid quickly due to their high oil content. And you just don't know how long those bags of ground/milled flaxseeds have been sitting at the store.
- Baking Powder - gives the bars a little lift and makes them less dense.
Add-ins
This is optional but here are some suggestions if you'd like to invite more fun, variety, and nutrition.
- Dried fruit - like raisins, blueberries, apricots, dates (be sure to finely chop any large fruits)
- Unsweetened coconut
- Finely chopped nuts or seeds
- Finely grated carrots or even zucchini (might sound strange but my kids love it and such an easy way to get more veggies into their bellies)
- Mini chocolate chips
- Unsweetened cocoa powder
Step-by-Step Instructions


- Preheat oven to 350 degrees Fahrenheit. Mash bananas in a large bowl using the back of a fork or a potato masher. Try to get it as smooth as possible but small lumps are fine. Measure out 1 cup. Freeze any leftovers. Stir in peanut butter and vanilla extract.
- Combine until well-incorporated.
- Add in the oats and the rest of the remaining ingredients
- Stir to combine.
- Pour the batter into a lined 8 inch square baking pan.
- Bake for 20-22 minutes. Remove, cool completely, cut into bars.
Tips for Success
- Line your baking pan with parchment paper for easy removal and clean up.
- Since there's no additional sweetener, use over ripe bananas. If you desire a sweeter banana oat bar, feel free to add some maple syrup.
- Be sure to measure out the bananas as every banana is different in size . Too much and you can end up with mushy oatmeal bars or if little, the bars will be dry.
Serving Suggestions

These peanut butter oatmeal bars are great as a quick breakfast or easy snack.
You can enjoy straight from the refrigerator or warmed with extra banana, a drizzle of peanut butter, or whatever toppings you fancy. Totally optional though.
A lot of times we just grab one as we head out the door for school or wherever life takes us.
Storage Suggestions
Transfer to an airtight container and keep in the refrigerator for up to 5 days.
To freeze, cool completely. Then flash freeze to prevent them from sticking together. Once frozen solid, transfer to a freezer safe container or bag. Will be good for up to 3 months.
More Banana Recipes

Banana Oatmeal Bars
Equipment
Ingredients
- 1 cup mashed overripe bananas (240g), about 2 medium bananas
- ½ cup creamy peanut butter (125g)
- 1 teaspoon pure vanilla extract
- 1 ¾ cups rolled oats (175g)
- 1 tablespoon ground flaxseeds
- 1 teaspoon cinnamon
- ½ teaspoon baking powder
Optional add-ins: ½ cup
- grated carrots, chocolate chips, fruit, coconut
Instructions
- Preheat oven to 350 degrees Fahrenheit. Mash bananas in a large bowl using the back of a fork or a potato masher. Try to get it as smooth as possible but small lumps are fine. Measure out 1 cup. Freeze any leftovers.
- Stir in peanut butter and vanilla extract. Add in the oats and the rest of the remaining ingredients, including chocolate chips, carrots, or any of the optional add-ins. Stir to combine.
- Pour the batter into a lined 8 inch square baking pan. Bake for 20-22 minutes. Remove, cool completely, cut into bars.
Notes
- Since there's no additional sweetener, use over ripe bananas. If you desire a sweeter banana oat bar, feel free to add some maple syrup.
- Transfer to an airtight container and keep in the refrigerator for up to 5 days. Or freeze for up to 3 months.
EE Mama says
This is now a staple in our house, but with almond butter. And chocolate chips, always. I try to make two batches at a time to have enough to freeze, but between my toddler and me, these don't last long. I've also added shredded carrots, shredded zucchini, hemp seeds, chia seeds, extra flax, shredded coconut, raisins, sour cherries, pepitas, and even brewer's yeast to turn these into lactation bars. I've really pushed the upper limits of how many add-ins I can do. I do decrease the oats a bit if I'm adding lots of dry. Thank you, Min, for the nutritious recipe!
Min says
Ooh LOVE LOVE all these ideas! I'm so glad you've loved all the variations and thank you for sharing!
Anne says
Hi,
Would my 11 month be able to eat this? Thank you!
Min says
Hi! Yes!
Lydia says
Hi! Any chance I can substitute applesauce for the bananas? Bananas make my kids so constipated unfortunately😥
Min says
You may be able to substitute with applesauce although I haven't tried it. Also, while underripe bananas can cause constipation, overripe bananas can actually help!
Rachel says
Is there anything to substitute flax seeds?
Min says
You can just leave it out or add chia seeds if you have it!
Sarah says
Will using sun butter make these turn green?
Min says
It will definitely be a different color but won't be green
Ernest says
So easy to make and delicious!