Oatmeal Peanut Butter Cookie Bars

4.51 from 61 votes
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These Oatmeal Peanut Butter Cookie Bars are about to change your life. They’re gooey on the inside, made with wholesome ingredients, and kid-friendly! This oatmeal cookie bars recipe uses all-natural sugar (hey, maple syrup!), white whole wheat flour, rolled oats, and all-natural peanut butter to keep these peanut butter oatmeal bars healthy and better-for-you! Oatmeal Peanut Butter Cookie Bars It’s Friday and you deserve a COOKIE BAR. But, these aren’t you average peanut butter cookie bars… They’re Peanut Butter Oatmeal Bars. You guys died over this sneak peek on Instagram stories, so we rejiggered our content calendar to get these up ASAP. We also made them two more times to make sure they’re perfect…and, well, they are! These peanut butter oatmeal bars are a spin-off of our Grain-Free Chocolate Chip Cookie Bars, but we added in some rolled oats and white whole wheat flour for more of a traditional cookie bar texture. This recipe is gooey, satisfying, and just the best. They’re not too sweet and you don’t have to worry about refined sugars because these peanut butter cookie bars are made with maple syrup and you can use vegan chocolate chips to keep things 100% dairy free. Here’s what else you need:

Let’s talk all-natural peanut butter for a second. We get this question all the time, what are your favorite all-natural peanut butters to bake with? What I like to look for in all-natural peanut butter is: 1. no added sugar and 2. the consistency. You want to make sure that your all-natural peanut butter is drippy and smooth. If the oil is separated from the nut butter, no fear, give it a nice stir and you should be good to go. Here are some of my favorite brands to use when it comes to all-natural peanut butter.

Best All-Natural Peanut Butter Brands

  • Smuckers (ALL-TIME FAV)
  • Whole Foods
  • Fresh Thyme
  • Costco
  • Trader Joe’s
As you can see I’m just a littttttle bit passionate about peanut butter. Sry not sry. Cookie bars Lastly, before I share the recipe for these oatmeal peanut butter chocolate chip bars, I wanted to talk about ingredient swaps. You guys are the swap queens, so I’m hoping to answer all of those questions here!
  • White whole wheat flour –> I recommend swapping with either all-purpose, whole wheat flour, or a gluten-free flour blend. Swap recommendation is 1:1. Note: Do not swap 1:1 for a nut-based flour such as almond flour, coconut flour, etc.
  • Peanut butter –> Good news! Any kind of nut butter works for this recipe! My favorite other than peanut butter is cashew butter! Swap recommendation is 1:1.
  • Maple syrup –> If you’re hoping to swap the maple syrup for another kind of sugar, make sure you use a liquid sweetener such as honey or agave. Swap recommendation is 1:1.
If you’re wondering what to swap out for the eggs, then this recipe isn’t for you! This is a nut butter and egg-based recipe, so I wouldn’t suggest nixing those!

Storage

Store these delicious peanut butter oatmeal bars in an airtight container in the refrigerator for up to 5 days. Freezer instructions: to freeze, place cooled bars on a cookie sheet. Then, freeze for 1 hour. Transfer bars from cookie sheet to a freezer-safe gallon-size bag. Remove as much air as possible and freeze for up to 3 months. Peanut Butter Cookie Dough Bars

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4.51 from 61 votes

Peanut Butter Oatmeal Bars

These Oatmeal Peanut Butter Cookie Bars are about to change your life. They’re gooey on the inside, made with wholesome ingredients, and kid-friendly! This recipe uses all-natural sugar (hey, maple syrup!), white whole wheat flour, rolled oats, and all-natural peanut butter to keep these peanut butter oatmeal bars healthy and better-for-you!
Prep: 15 minutes
Cook: 15 minutes
Total: 30 minutes
Servings: 9
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Ingredients 

Dry Ingredients

Wet Ingredients

Instructions 

  • Preheat the oven to 350ºF and spray an 8×8 baking pan with non-stick cooking spray or line with parchment paper.
  • Next, add all of your dry ingredients to a bowl and mix well. Set aside.
  • In a separate bowl, whisk your eggs. Then add the rest of your wet ingredients to the eggs. Mix well.
  • Slowly add your dry ingredients to wet ingredients. When ingredients are well combined, pour dough into your baking pan. Spread evenly.
  • Bake at 350ºF for 15-18 minutes (depending on your oven) and how gooey you want your bars).

Tips & Notes

  • Option to sub any other drippy nut butter such as cashew or almond for the peanut butter.
  • Option to sub the white whole wheat flour for a gluten-free flour blend. We do not recommend subbing for coconut flour.

Nutrition

Calories: 361 kcal, Carbohydrates: 37 g, Protein: 9 g, Fat: 21 g, Fiber: 5 g, Sugar: 19 g

Nutrition information is automatically calculated, so should only be used as an approximation.

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About Lee Funke

Lee is the founder of Fit Foodie Finds and based in Minneapolis, MN. She started this website in 2010 as a way to share her love for real food and wellness. The internet has changed so much since then and so has Fit Foodie Finds. Today we're a female-run recipe website publishing hundreds of tried and true recipes developed and tested by our team.

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Lenana
Lenana
December 4, 2019 2:56 pm
Recipe Rating :
     

5 stars
My family and I ate them all in less than 24 hours. We will definitely make again.

Tina
Tina
May 17, 2019 8:26 am
Recipe Rating :
     

5 stars
I will be making these bars again for sure! I work at a cafe and do all the baking, and these bars have been immensely popular — they look great, taste amazing, and keep really well.
The only problem I had was that I had to bake them almost 30 minutes more than the recipe said, as the batter was really really moist. I substituted wheat for the oat flour, so that may have been part of the reason.
Other than that, top notch!

Brit
Brit
January 22, 2019 3:58 pm
Recipe Rating :
     

5 stars
Dare I say it…this might be my FAVORITE Fit Foodie recipe. It is the perfect amount of gooey deliciousness and I can’t stop eating them. I’ll be making these over and over again.

Vivian k
Vivian k
January 11, 2019 12:43 pm

I make oatmeal jelly bars where the middle has a thin layer of jam. Do you think this batter will work, minus the choc chips? Iโ€™ve been looking for a recipe for peanut butter jelly bars that uses oats.

Leslie
January 11, 2019 11:54 am
Recipe Rating :
     

5 stars
I love these! Iโ€™ve made them 4 or 5 times now. My family always asks for them. I have changed them up a bit: I use the crunchy pb TJโ€™s brand, omit the chocolate chips and subbed 1tbsp of cocoa powder instead. It truly feels like a gooey brownie that I can feel good about having! I donโ€™t eat sweets, so I appreciate how mild the sweet is because I donโ€™t add the chips. Exactly what I was looking for ๐Ÿ’š Thank you!!

Sylvia Lashley
Sylvia Lashley
June 29, 2023 8:32 am
Reply to  Leslie

I used 1/4 cup of chocolate chips and 2 teas. Of cocoa powder because I don’t like things to sweet either. Baked them for 27 minutes and they turned out great!! Thanks for the idea!

Kate
Kate
January 6, 2019 11:24 am

I donโ€™t have any white whole wheat flour on hand, but I have regular whole wheat flour. Would that work?

Laura
Laura
January 5, 2019 9:52 am

Can I use PB2 (peanut butter powder) mixed with something to substitute for peanut butter? Looking to lower the calories per bar. Thanks!

cc
cc
January 4, 2019 9:40 pm

would this work with pb2?

Kay
Kay
December 27, 2018 3:22 pm

How do you think it will turn out if I use 1/2 cup of protein powder in place of oats?

Kimberly
May 11, 2018 4:04 am

Yumm! I just made this recipe yesterday and it tasted really good.