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4.52 from 31 votes

Chocolate Monster Cookies

Recipe from Two Peas and Their Pod

Chocolate peanut butter cookies with oats, chocolate chips, and colorful M&M's. These fun and delicious cookies are perfect for Halloween or anytime!
Prep Time15 minutes
Cook Time10 minutes
Total Time25 minutes
Course: Cookies
Cuisine: American
Keyword: chocolate, peanut butter
Servings: 36 cookies
Calories: 232kcal



  • Preheat the oven to 350 degrees Line a large baking sheet with parchment paper or a Silpat baking mat and set aside.
  • In a medium bowl, whisk together the flour, cocoa, baking soda, and salt. Set aside.
  • Using a stand mixer or hand-held mixer, beat the butter and sugars together until creamy and smooth. Scrape down the sides of the bowl with a spatula, if necessary. Add the peanut butter and beat until combined.
  • Add in the egg and vanilla extract. Mix until well combined.
  • Add the dry ingredients and mix on low until just until the combined. Don't over mix. Gently stir in the oats, chocolate chips and M&M’s.
  • Scoop the cookies into round balls, about 2 tablespoons of dough per cookie, and place on the prepared baking sheets, leaving 2 inches in between cookies. Bake for 10-12 minutes, or until the cookies are lightly browned around the edges, but still soft in the middle.
  • Remove cookies from oven and sprinkle the cookies with sea salt. You can also gently press additional chocolate chips and M&M’s on top of the cookies to make them look extra pretty. For Halloween, you can even add candy eyeballs.
  • Let the cookies cool on the baking sheet for about 5 minutes or until set. When set, transfer cookies to a wire rack and cool completely.


Store the cooled cookies in a sealed container on the countertop for up to 3 days.


Calories: 232kcal | Carbohydrates: 27g | Protein: 4g | Fat: 13g | Saturated Fat: 6g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 0.2g | Cholesterol: 24mg | Sodium: 104mg | Potassium: 125mg | Fiber: 2g | Sugar: 18g | Vitamin A: 186IU | Vitamin C: 0.03mg | Calcium: 26mg | Iron: 1mg