The Best Healthy Monster Cookies

healthy monster cookies on parchment lined black wire rack

4.3 from 7 reviews

These Healthy Monster Cookies are for all those peanut butter and m&ms lovers. Lightened up, flourless peanut butter cookies made gluten-free using certified gluten-free rolled oats. Loaded with peanut butter flavor, chocolate chips and candy coated milk chocolate. The perfect thick, soft peanut butter cookie.


Units Scale
  • 1/4 cup unsalted butter, softened
  • 1/2 cup dark brown sugar (can use 1/3 cup)
  • 3/4 cup natural creamy peanut butter (the drippy kind)
  • 1 large egg + 1 egg yolk
  • 1 teaspoon vanilla extract
  • 1.25 cups gluten-free rolled oats
  • 3 tablespoons flaxseed meal
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon fine sea salt
  • 1/3 cup chocolate chips
  • 1/3 cup coated chocolate candies (plus more for topping if desired)


  1. Preheat oven to 350ºF. Line large baking sheet with parchment paper; set aside
  2. Mix wet ingredients: In large bowl of stand mixer or using electric hand mixer, beat together butter, peanut butter and sugar for about 1 minute. Scrape down sides of bowl then add in egg, egg yolk and vanilla; mix on low-medium speed until combined.
  3. Add dry ingredients: Add in rolled oats, flaxseed meal, baking soda and salt. Use mixer on low-medium speed until combined. Batter should be soft but not too wet and not too dry.
  4. Fold in mix-ins: Using a sturdy spatula or wooden spoon, fold in chocolate chips and candies until evenly distributed.
  5. Add to baking sheet: Using medium cookie scoop (about 1.5 tablespoons), scoop dough and drop onto cookie sheet spacing evenly, shaping into even circle and flattening slightly with palm of hand (about 1/2″ thickness). These cookies won’t spread much, so you want to flatten them slightly.
  6. Bake for 7-9 minutes. Remove from oven and allow cookies to cool on baking sheet for 2-3 minutes. At this time, you can finish off the tops with more chips or candies.
  7. Transfer to cooling rack and enjoy! 


Recipe update 2022 – recipe updated for better results after reader feedback. They hold together much better now! Thick and soft!

Peanut Butter – I used a natural peanut butter with just peanuts and salt for the ingredients. If you choose to use a creamy peanut butter (i.e. JIF), that should also work but you may want to add a tablespoon of oil to the batter.

Butter vs Coconut Oil – I did NOT test these with coconut oil, but it will likely work – just make sure oil is softened and you may need to cream longer with peanut butter and sugar. Let me know if you try!


Keywords: Gluten Free Monter Cookies, Healthy Monster Cookies, Gluten Free m&m Cookies