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Close up view of Flourless Monster Cookie Bars from One Lovely Life

Flourless Monster Cookie Bars (Gluten Free, Dairy Free)

  • Author: Emily from One Lovely Life
  • Total Time: 37 minutes
  • Yield: 16 squares 1x


These delicious peanut butter blondies are studded with rolled oats, chocolate chips, and chocolate candies. Plus, they’re gluten free and dairy free! The perfect easy treat to satisfy your sweet tooth.  

(Recipe adapted from Ambitious Kitchen)



For The Flourless Monster Cookie Bars:

  • 1 cup natural peanut butter, room temperature*
  • 2 eggs
  • 1/2 cup coconut sugar
  • 1/4 cup pure maple syrup
  • 1 Tablespoon coconut oil
  • 1 1/2 teaspoons vanilla extract
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1/4 cup rolled oats (certified gluten-free oats, if needed)
  • 1/4 cup semi-sweet or dark chocolate chips**
  • 1/4 cup candy-coated chocolate candies (like M&Ms. See notes for GFDF options)

Optional (to top):

  • 1 Tablespoon each chocolate chips + candies
  • A pinch coarse sea salt flakes


  1. Preheat the oven to 350 degrees F.
  2. Line an 8×8 or 9×9″ baking pan with parchment paper.
  3. In a large bowl, combine peanut butter, eggs, coconut sugar, maple syrup, coconut oil, and vanilla. Stir until well combined.
  4. Then, sprinkle baking soda, salt, rolled oats, chocolate chips, and candies over the wet ingredients. Stir until mixed in.
  5. Pour the batter into your prepared baking pan, and use a spatula to spread out the dough. (It’ll be quite thick and sticky.)
  6. Sprinkle with 1 Tbsp extra chocolate chips and candies (optional–but it makes them look pretty!)
  7. Bake at 350 degrees for 18-22 minutes (for 9×9″pan) or 20-24 minutes (for 8×8″ pan), or until the center is nearly set and the edges are golden.
  8. If desired, sprinkle immediately with coarse sea salt flakes.
  9. Allow the cookie bars to cool before slicing into 16 squares. Store leftovers in an airtight container in the fridge or store in the freezer up to 1 month.


*Natural peanut butter should contain ONLY peanuts or ONLY peanuts and salt. No added oils or sugars.

**Our favorite allergy friendly chocolate chips are Enjoy Life brand or Tollhouse Simply Delicious

***Two dairy free/gluten free M&M-type candy options are: Little Secrets Dark Chocolate or UNREAL quinoa crispy candies.

  • Prep Time: 15 minutes
  • Cook Time: 22 minutes
  • Category: Dessert, Cookies, Bars
  • Method: Baking
  • Cuisine: American

Keywords: Flourless monster cookies, monster cookie bars, peanut butter blondies, peanut butter chocolate chip blondies, gluten free, dairy free, vegan