Chewy Oat & Peanut Butter Cookie Bars Recipe

Bars of gooey and chewy Peanut Butter Cookies made with oats and finished with chocolate chips. Think peanut butter brownies that melt in your mouth!

peanut butter cookie bars piled on top of each other on a white table

Healthy desserts don’t have to mean no sugar and…well, no fun! Plus, I have a thing for creating recipes like this that taste way too good to be healthy. They’re refined sugar free, yet they are freaking DELISH. I can almost guarantee you’ll be coming back for more until the tray is empty. Consider this your warning to double the batch. 😉

How to make these Chewy Oat & Peanut Butter Cookie Bars

  • When choosing your peanut butter, get the good stuff – Opt for ‘natural’ with no added sugar or oils. Peanut butter not only acts as a natural oil in this recipe, but also flour and keeps the health game in check! Seriously… What can’t peanut butter do?
  • Serving options – Perfect to enjoy as is, as a midday snack, or as a late night dessert after dinner with a side of vanilla bean coconut ice cream.
  • Meal prep friendly – These cookie bars are perfect for meal prep. The recipe makes 9 squares which will store nicely in an airtight container at room temperature for 3-5 days.


WIP shot of peanut butter cookies in a mixing bowl and in a baking tray

Like most of my recipes, these Chewy Oat & Peanut Butter Cookie Bars are super easy to make and only require 10 ingredients! You can make these cookie bars with your little one on your hip or in a baby carrier. They are such a fun treat for a dessert or even just a late night snack!

homemade peanut butter cookie bars cut up on a white surface

Refined Sugar Free Cookie Bars

Peanut butter mixed with natural sweeteners give your cookie bars that sweetness (and that ooey gooey texture) without adding refined sugar. I love using a combination of coconut sugar and maple syrup because it’s healthier and naturally sweet. 

peanut butter cookie bars being served up on a white surface with a metal spatula

What’s your favourite sweet treat? Let me know in the comments below! 

If you make this recipe, be sure to share a photo on social media and tag me @healthnutnutrition #healthnuteats so that I can see your creations! 

If you love this recipe and you’re looking to make other healthier versions of your favourite treats, you are going to love my DIY Healthy Twix Chocolate Bars and Snickers Shortbread Cookie Bars.


Chewy Oat & Peanut Butter Cookies

Bars of chewy and gooey Peanut Butter Cookies made with oats and finished with chocolate chips... Think peanut butter brownies that melt in your mouth!
Prep Time: 5 minutes
Cook Time: 20 minutes
Total Time: 25 minutes



  • 1/2 cup creamy natural peanut butter
  • 1/2 cup crunchy natural peanut butter
  • 1/2 cup coconut sugar
  • 1/3 cup pure maple syrup
  • 2 eggs
  • 1 tsp pure vanilla extract


  • 1 1/2 cups old fashioned oats
  • 1 tsp baking soda
  • 1/4 tsp sea salt
  • 1/3 cup chocolate chips dairy free if needed
peanut butter cookie bars piled on top of each other on a white table
Course Dessert
serves: 9
Print Recipe Save Recipe Leave a review


  • Preheat the oven to 350F and line a 8x8 baking pan with parchment paper.
  • Next, in a large mixing bowl, either with a stand mixer or using an electric hand mixer, whisk together the two peanut butters, coconut sugar, maple syrup, and vanilla until smooth. Crack in one egg at a time and whisk until combined.
  • Stir in the oats, baking soda and sea salt until just combined, making sure to not over mix.
  • Fold in the chocolate chips and transfer the batter to your baking pan, making sure to press the mixture down evenly with the back of a rubber spatula.
  • Bake in the oven for 18-20 minutes or until the edges are rounded and the top is slightly firm to the touch.
  • Transfer to a cooling rack and allow it to fully cool to firm up a bit before slicing, as this will ensure they are extra gooey and soft inside.


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  1. 5 stars
    I’ve made these four or five times and we love them! They are so easy, I just stir the ingredients together with a rubber spatula to cut down on dishes and make it all in one bowl. I also use all smooth peanut butter because I don’t buy crunchy and they are still amazing. I am now wondering if I cut down on the maple syrup and coconut sugar if they would still be good. Just trying to reduce all sugars in general, but I definitely appreciate no refined sugars in this recipe. I always have to bake for an extra 5 min or so as they are too jiggly after the 20 min but they come out amazing. Even better if you eat them cold!!!

  2. Could I use honey instead of maple syrup? I live in Nepal and natural sweeteners are impossible to find besides honey!

  3. 5 stars
    This recipe was soo delicious. I didn’t have an 8×8 pan so I used I circular 9in pan and it still worked out. Very moist, chewy, and a great snack while breastfeeding, even the husband loved it!

  4. 4 stars
    These had an amazing flavor but mine came out really dry… I’m definitely going to try them again but cook them for a less amount of time.

  5. 5 stars
    I just made these last night and they are so delicious! Quick question: do you think they would freeze well? I’m looking for things I can stock my freezer with before baby #2. Any tips if they are freezable for thawing? Thanks 🙂

  6. Can you replace the coconut sugar with a liquid sweetener such as honey or maple syrup? Anyone tried this?