These delicious 3-Ingredient Peanut Butter Banana Oatmeal Cookies are perfect for breakfast when you need something simple. Only 3 ingredients without gluten, flour, eggs or sugar!

These peanut butter oatmeal cookies are inspired by these Healthy 3-Ingredient Sweet and Salty Oat Cookies on my site.
Loved by moms and toddlers alike, if you're looking for a little chocolate hit, check them out here.
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Also, if you're looking for other peanut butter and oat combos to try out for breakfast, check out this recipe for Healthy Soft-Baked Oatmeal with Peanut Butter and Peaches😋
😋More Easy Gluten-Free Breakfast Recipes
📝Ingredients for peanut butter banana oatmeal cookies
- Gluten-free rolled oats (I buy this gluten-free brand: Only Oats)
- Natural peanut butter
- Bananas
Yep. That's it.
No flour. No sugar. Just simple!
See recipe card for quantities.
🥣Instructions
- Step 1: Measure peanut butter, rolled oats and bananas. Pre-heat oven and line a cookie sheet with parchment paper.
- Step 2: Mash bananas with the back of a fork.
- Step 3: Add mashed bananas, oats and peanut butter to a large bowl.
- Step 4: Mix until completely combined.
- Step 5: Add approximately 2 tablespoon spoonfuls of the cookie batter to the prepared cookie sheet.
- Step 6: Bake at 350F for about 18 minutes and enjoy warm!
And if you're looking for more healthy breakfast cookie ideas, these Gluten-Free Breakfast Oat Cookies with Date Sugar would be right up your alley.
Hint: cooking time is forgiving!
Because these are fool-proof and just so simple, I've found if you bake them for 10 minutes, you get a softer but a healthy cookie that still holds together.
If you bake them for 20 minutes in the oven, the bottoms will start to brown and so do the edges. But still, totally yummy and good to eat.
Baking these healthy cookies for 18 minutes is the sweet spot.
The healthy cookie turns out chewy and soft but they don't fall apart.

🤩What makes these simple peanut butter banana oat cookies so healthy?
It's these 3 powerhouse ingredients!
- Peanut butter - packing a good amount of niacin (vitamin B1), plus protein, some fibre and providing a source of manganese, copper, vitamin E, vitamin B6, and magnesium. #Peanutbutterislife💛
- Bananas - this humble fruit is packed with healthy carbohydrates, fibre, potassium, vitamin B6 and manganese
- Rolled oats - packed with healthy carbohydrates, cholesterol-lowering fibre and the added benefit of keeping your blood sugars stable and you feeling fuller longer, rolled oats need to be a part of your life if they're not already😄
🔄Substitutions
Here are some swaps you could use to change up these healthy breakfast cookies:
- Type of Oats - stick with rolled oats for this recipe. I do not recommend using "quick oats" or steel cut oats
- Peanut Butter - I have natural peanut butter in the house (and recommend it) but if you only have regular peanut butter, you can use that instead. Change up the flavor by using almond butter instead of peanut butter!
💃Variations
There's a lot of options to add different flavours or even fun textures to this healthy oatmeal cookie.
Here are some ideas:
- Crunch - if you have roasted peanuts on hand, chop up a handful and sprinkle those on top of the cookies before you bake them
- Chocolate - if you want to up the decant factor, add some chocolate chips into the mix
- Coconut - include a hit of that tropical-feeling by topping each cookie with some unsweetened, shredded coconut
- Raisins- love these little gems? Throw some raisins into mix before scooping the cookies onto the baking pan
- Fruit - this variation uses raspberries to up the sweetness without overloading on sugar. Check out these Healthy Peanut Butter Oatmeal Raspberry Breakfast Bites (gluten-free)
Roasted peanuts also go well on top of this recipe for Easy Peanut Sauce with Lime. Perfect to enjoy with this Chicken & Mango Quinoa Bowls with Peanut Sauce!
🥡Storage
These simple breakfast cookies stay fresh and moist on your kitchen counter for up to 3 days in an air-tight container.
These flourless cookies freeze very well too.
Make a double batch and freeze them in a heavy ziplock bag or air-tight container for up to 3 months.
Top Tip
If you have frozen bananas in your freezer and want to thaw those and use them in this recipe, that works too🍌
Make sure the bananas are thawed and mashed too before you use them.
Hope you love these Peanut Butter Banana Oatmeal Cookies like we do!
~April
📖 Recipe
3 Ingredient Peanut Butter Banana Oatmeal Cookies
Ingredients
- 2 medium bananas about 1 cup, mashed
- 1 ¾ cup gluten-free rolled oats gluten free
- ¾ cup peanut butter natural
Instructions
- Pre-heat oven to 350 degrees F.
- Peel the bananas and using the back of a fork, mash them on top of a cutting board until the big lumps are gone.
- Add the mashed bananas, rolled oats and peanut butter to a large bowl. Mix until combined with a spatula.
- Place mounds of the mixture - about 2 Tablespoons each - onto a cookie sheet, lined with parchment paper. Press them each down a little bit with your fingers as these cookies do not spread when they bake. If it's too sticky, use the back of a wet fork.
- If you're adding any chopped nuts or shredded coconut, sprinkle that on top.
- Bake in the pre-heated oven for ~18 minutes. Remove from the oven and let cool.
- Store in an air-tight container for 3 days or freeze for up to 3 months.
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