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Home » Recipes » Cookies » Flourless Monster Cookie Bars

Published on February 3, 2017 | Updated on April 29, 2020 by The BakerMama

Flourless Monster Cookie Bars

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Bake these tasty Flourless Monster Cookie Bars that are loaded with oats, peanut butter, mini chocolate chips and mini M&Ms. Easy, fun and oh so yum!!

I have a slight obsession with monster cookies & mini M&Ms & peanut butter & oats & pretty much everything that is these monster cookie bars! If you love monster cookies, you’ve gotta bake these ASAP. You’re going to love them!

They’re basically an easier version of monster cookies because they’re baked in bar form. No rolling, spacing or baking in batches until all the dough has been used. Just press and bake!

Thick, chewy bars of peanut butter oatmeal chocolate candy loaded goodness. What’s not to love?!

The dough comes together in no time and unlike most cookie bar recipes, the oatmeal and peanut butter are doing most of the work. No flour or butter getting in their way!

The dough will appear crumbly, but trust me, trust me!, it presses perfectly into the pan…

Then just 30 minutes in the oven for all the yumminess to come together…

The kind of bars that will bring all the kids to the kitchen (and adults too!). Every time I bake these (which has been quite often here lately!), we can hardly wait to slice into them…

The oats are toasty yet hold their chew and compliment the flavor of the peanut butter, brown sugar and chocolates so well.

These monster cookie bars are great to bake for parties, after-school snack and of course, nightly dessert! Enjoy!

xoxo,

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Flourless Monster Cookie Bars

  • Author: Maegan - The BakerMama
  • Prep Time: 5 mins
  • Cook Time: 30 mins
  • Total Time: 35 mins
  • Yield: 18
  • Category: Dessert
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Description

Bake these tasty Flourless Monster Cookie Bars that are loaded with oats, peanut butter, mini chocolate chips and mini M&Ms. Easy, fun and oh so yum!!


Ingredients

  • 2 cups creamy or crunchy peanut butter
  • 1 cup brown sugar
  • 2 teaspoons vanilla
  • 2 large eggs
  • 2–1/2 cups old-fashioned rolled oats
  • 1 teaspoon baking soda
  • 1 teaspoon kosher salt
  • 1 cup mini chocolate chips
  • 1 cup mini M&M candies

Instructions

  1. Preheat oven to 350°F. Line a 9 x 13-inch baking dish with parchment paper and spray with non-stick cooking spray. Set aside.
  2. In the bowl of an electric mixer fitted with the paddle attachment, beat the peanut butter and brown sugar until smooth. Add the vanilla and then the eggs, one at a time, beating until well incorporated.
  3. Add the oats, baking soda and salt and mix on low speed until just combined. Stir in the chocolate chips and M&Ms.
  4. Press mixture evenly into prepared baking dish. The dough will be crumbly at this point, but it should press perfectly into the pan.
  5. Bake for 30 minutes or until the top of the bars starts to turn golden brown.
  6. Remove from oven and lest rest for at least 15 minutes before slicing into.

Did you make this recipe?

Tag @thebakermama on Instagram and hashtag it #thebakermama

 

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Reader Interactions

Comments · 15

  1. Michele {Delish Dishes from Michele} says

    February 7, 2017 at 8:25 am

    These look delicious! All your recipes just make me happy, lol. They’re so simple and yummy looking! Thanks for all you do for your readers 😉

    Reply
  2. Rochelle says

    April 1, 2018 at 10:21 pm

    Can you use a regular blender if you don’t have a standing mixer? Or should I just hand mix all the ingredients?

    Reply
    • Maegan says

      April 2, 2018 at 1:51 pm

      Hi Rochelle! I wouldn’t recommend using a blender as you don’t want the ingredients to be too blended together. Mixing with a handheld electric mixer or with a sturdy spoon should work great. Enjoy!

      Reply
  3. Esha says

    September 5, 2018 at 12:32 pm

    Is there any way to make these without peanut butter (or any type of nut butter)?

    Reply
    • Maegan says

      September 7, 2018 at 6:24 am

      Hi Esha! You could use sunflower seed butter, Nutella or cookie butter. Enjoy!

      Reply
      • Arlene says

        March 3, 2020 at 10:17 am

        Isn’t Nutella a nut based ingredient (hazelnut)? Grandson allergic to all tree nuts, not just peanuts….what is cookie butter……it is the same as unsalted butter?

      • The BakerMama says

        March 3, 2020 at 11:46 am

        Hi Arlene! Nutella is made of hazelnuts which is a tree nut. Peanuts are not tree nuts. Cookie butter is made with cookie crumbs so there’s usually no nuts in it. It has a similar texture to peanut butter. Very different from regular butter. Hope this helps!

  4. Jill says

    September 14, 2018 at 8:11 pm

    Can you use natural peanut butter with the oil that needs to be mixed in?

    Reply
    • Maegan says

      September 17, 2018 at 8:49 am

      Hi Jill! Yes, just make sure you stir the peanut butter well to incorporate the oil before measuring it out to add to the recipe. Enjoy!

      Reply
  5. Lana Dillon says

    September 30, 2018 at 9:33 am

    Can I use quick gluten free oats?

    Reply
    • Maegan says

      September 30, 2018 at 2:30 pm

      Hi Lana! Yes, they should work and taste great in this recipe. Enjoy!

      Reply
  6. Emily Edelman says

    March 2, 2020 at 9:36 pm

    How do you store?

    Reply
    • The BakerMama says

      March 3, 2020 at 11:07 am

      Hi Emily! Just store them in an airtight container at room temperature. Enjoy!

      Reply
  7. Ashley Boitson says

    February 18, 2021 at 5:19 pm

    Mine turned out super dry. Not sure why as i followed the recipe. Only difference is I used a natural peanut butter but it was stirred up good

    Reply
    • The BakerMama says

      February 28, 2021 at 4:08 pm

      Hi Ashley! It sounds like your natural peanut butter or brown sugar might have been dried out. Next time, if you notice the batter is dry before baking, add some more peanut butter. Hope this helps and that you’re able to try them again soon.

      Reply

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