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Chocolate chip peanut butter banana oat bars are the perfect portable breakfast, healthy snack, or sweet treat, anytime! Made with 4 simple ingredients, they are vegan, gluten-free, oil-free, and 80 calories each.

Table of Contents
- Perfect 4 Ingredient Breakfast/Snack Bars
- Recipe Benefits
- Ingredients for Chocolate Chip Peanut Butter Banana Oat Bars
- Step by Step Instructions
- Step One: Preheat the Oven and Prepare Baking Sheet
- Step Two: Mash the Banana
- Step Three: Add the Remaining Ingredients
- Step Four: Spread in Baking Pan
- Step Five: Bake
- Step Six: Cool and Cut the Bars
- Related Recipes
- Chocolate Chip Peanut Butter Banana Oat Bars (4 ingredients) Recipe
Perfect 4 Ingredient Breakfast/Snack Bars
I’ve come down with a tenacious strain of spring cleaning-itis. So yesterday, the refrigerator and floors were scrubbed, the cookbooks were codified (and dusted), the equipment was polished and systematized, and last, the walk-in pantry (which was approaching nightmare status), was given a massive overhaul.
In the process of that final activity, I discovered not three jars of peanut butter and 2 and 1/2 large containers of oats. Combined with the two bunches of very ripe bananas on the countertop, the writing was on the wall: time to bake!
The result is a perfect breakfast bar or snack bar that everyone will love: Chocolate Chip Peanut Butter Banana Oat Bars!

Recipe Benefits
The bars are so delicious–soft, sweet, flavorful–but also packed with wholesome goodness and super-simple to make. Specifically, they are:
- Vegan (egg-free, dairy-free)
- Gluten-free
- Oil-free
- Made with only 4 familiar ingredients
- Made in one bowl (in about 2 minutes)
- Frugal
- Loved by kids and adults alike
Ingredients for Chocolate Chip Peanut Butter Banana Oat Bars
The exact amounts of each ingredient are indicated in the recipe card at the end of the post. Toggle between US Customary (volume) and Metric (weights) for preferred measurement option.
I mentioned three of the four ingredients above (my accidental hoard). They are:
- rolled oats (any variety, but use certified gluten-free oats if you need these to be 100% gluten-free)
- very ripe bananas
- creamy peanut butter (an equal amount of other creamy nut or seed butter–such as almond, cashew, or sunflower seed– can be used in place of the peanut butter).
- chocolate chips (use dairy-free chocolate chips to ensure these bars are 100%; if that is not necessary, any variety of chocolate chips (or chunks) will do. You can also sub them for dried fruit or nuts (or add all three! More is more).

Step by Step Instructions
Note that the complete directions are also in the recipe card below.
Step One: Preheat the Oven and Prepare Baking Sheet
Preheat the oven to 350F (180C). Line an 8-inch (20 cm) square baking pan. with parchment paper (for extra-easy removal after baking). Alternatively, spritz with cooking spray, or do a light oiling of the pan.
Step Two: Mash the Banana
Mash enough bananas to measure 1/2 cup. I prefer to go by cup measurements rather than stating banana size, since bananas can vary tremendously. Most times it take abotut 1 and 1/2 medium bananas to equal 1/2 cup.
The banana should be very ripe and squishy (an indication that the starches have converted to sugar). Mash them with fork until they are almost liquid.

Step Three: Add the Remaining Ingredients
Now that the bananas are mashed, combine them with the peanut butter (or the nut/seed butter of your choice) in a medium bowl until blended.

Add the dry oats and chocolate chips to the bowl.

Stir until everything is combined and the oats are universally moistened.
That was easy, right?

Step Four: Spread in Baking Pan
Spread the dough in an even layer in the prepare pan

Step Five: Bake
Bake the bars in the preheated oven for about 15 minutes until the surface looks and feels (to the touch) dry and the edges are golden brown.

So easy!
Step Six: Cool and Cut the Bars
But now comes the hard part: waiting for these to cool (about 45 minutes to an hour) before cutting. It requires significant will power, but it is so worth the wait.
If you lined the pan with paper, use the overhang to lift the bars onto a cutting board to cut into 16 squares. Otherwise, cut the bars directly in the pan.
YUM!

Happy baking, everyone!
Related Recipes

Chocolate Chip Peanut Butter Banana Oat Bars (4 ingredients)
Equipment
- 1 8-inch (20 cm) square baking pan
Ingredients
- 1/2 cup mashed very ripe banana
- 1/4 cup creamy peanut butter , (or any nut butter /seed butter of choice)
- 1 1/2 cups rolled oats, (certified gluten-free, as needed)
- 1/3 cup chocolate chips, (see notes for options)
Instructions
- Preheat oven to 350F (180C). Line an 8-inch (20 cm) square baking pan with parchment paper (or simply spray with nonstick cooking spray).
- In a medium bowl, combine the banana and peanut butter until smooth. Add the oats and chocolate chips, stirring until completely blended.
- Spread into prepared baking pan, pressing down firmly.
- Bake in the preheated oven for 14 to 17 minutes until the surface looks and feel dry and the edges are golden brown.
- Cool in the pan for 45 minutes to an hour before cutting into 16 bars.
Notes
Nutrition




Can you use natural pb for this recipe?
Hi Halen,
Yes, you can definitely use natural peanut butter.Cheers.
Thank you so much! That was absolutely delicious! I made a third times! I added some cinnamon , Maple syrup, a pinch of cloves and butter. My boys love it.
Oh my goodness, that sounds so good, Summer! Glad the boys love the bars!
Can I use quick oats or steel cut oats for this recipe? Those are the only ones I have on hand and would love to make these!
Hi ririgirl!
Yes to the quick oats! Steel cut oat are much thicker and will not cook through for this recipe. 🙂
Delicious any time of day! I love that it’s made of things that I usually always have on hand. Thanks for sharing!!
Yay! I agree with the anytime of day part, especially, Christeen 🙂 So happy that you like these!
We only buy sugar and salt free peanut butter. Is the banana and chocolate chips enough to sweeten it? Or should I add a little bit of honey or maple syrup?
Hi Joni! I use unsweetened peanut butter and find that it is sweet enough, but my husband prefers a touch of sweetness added –a tablespoon of sweetener per batch really ups the sweetness of the bananas 🙂
So easy and so good, thank you for these!
So glad you like them Elyse!
Made them almond butter, delish! Added some roasted almonds, too, for extra energy anda smidge of almond extract. amazing.
I want you to know how much my family love these bars! I’ve been making them regularly since you first posted the recipe. They are a family staple! I vary them a little for the time of year, but we usually just do the basic recipe and love it. Thank you!
So sweet and good, but healthy, too! I add some walnuts and dried cranberries, sometimes some chia seeds. They are always incredible.
I have been looking for a an easy tasty breakfast bar. These are perfect, thank you, Camilla!
Love love love this recipe! I love PB in everything. I put it on bread, on waffles and pancakes and french toast, in oatmeal, on fudgesicles (so good!), on brownies and cookies, you get the gist. It is a runner’s best fried for instant power!
One of my favorite recipes, now, thank you!
These are great. I’m not a baker and I can still make these and they are wonderful. All the best.
Camilla – I love all of your recipes so much, especially thes really minimalist ones. I was happily surprised how yummy these are with so few ingredients. LOVE!
Wow! These are great. I am glad I am not the only one who accidentally hoards peanut butter. Thanks for sharing.