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–+ servings
Monster cookies on a baking sheet.

High Altitude Flourless Monster Cookies (GF, Dairy Free)

Heather Smoke
The easiest high altitude recipe for soft and chewy monster cookies, loaded with M&Ms and chocolate chips.

All recipes on Curly Girl Kitchen are developed for high altitude at 5,280 feet. See FAQs for adjusting to higher or lower elevations.

5 from 2 votes
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Prep Time 10 minutes
Cook Time 9 minutes
Total Time 19 minutes
Course Dessert
Cuisine American
Servings15

Equipment

  • Baking Sheet + Parchment Paper
  • Large Cookie Scoop with Release Lever (3 tablespoon capacity)

Ingredients
 

  • 1 cup creamy peanut butter
  • ½ cup granulated sugar
  • ½ cup light brown sugar, lightly packed
  • 2 large eggs, lightly beaten
  • 2 tsp vanilla extract
  • 1 tsp baking soda
  • ¾ tsp coarse Kosher salt (if using table salt, use half the amount)
  • ¾ cup old-fashioned rolled oats
  • ¾ cup semi-sweet chocolate chips, divided
  • ¾ cup M&Ms, divided
  • 30 candy eyeballs, optional

Instructions
 

  • Preheat the oven to 350 F, and position a rack in the center of the oven. Line a baking sheet with parchment paper.
  • In a bowl, stir together the peanut butter, granulated sugar, brown sugar, eggs, vanilla, baking soda and salt, until well combined.
  • Add the oats, 1/2 cup of chocolate chips and 1/2 cup of M&Ms. Stir together into a soft, sticky dough.
  • Use a large cookie scoop (3 tablespoon capacity) or cupcake scoop with a release lever to scoop the dough and drop it onto the baking sheet, leaving 3 inches between each cookie (I recommend baking just 6-8 cookies at a time). Do not flatten the dough.
  • Bake the cookies for exactly 9 minutes. Take the pan out of the oven, and immediately use a round cookie cutter (one that's larger than the circumference of the baked cookies) and "scoot" it around the hot cookies. This pulls in the uneven edges and makes your cookies perfectly round and uniform.
    Let the cookies cool on the baking sheet for 5 minutes. While they cool, decorate the tops of the hot cookies with the remaining 1/4 cup each of chocolate chips and M&Ms, and the candy eyeballs.
  • Gently transfer the cookies to a cooling rack and cool completely.
    TIP: Although the center of the cookies will seem under-baked after just 9 minutes, the oats will absorb moisture and the cookies will set up perfectly as they cool. If you over-bake these cookies, they'll end up dry and crunchy as they cool, instead of soft and chewy.
Keyword Chocolate Chip, Cookies, Flourless, High Altitude, M&Ms, Monster, Oatmeal, Peanut Butter
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