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4.58 from 172 votes

Monster Cookies

Recipe from Two Peas and Their Pod

Monster Cookies are loaded with oats, peanut butter, chocolate chips, and M&M'S. Everyone loves this classic cookie recipe, even the Cookie Monster approves!
Prep Time10 minutes
Cook Time12 minutes
Total Time22 minutes
Course: Cookies, Dessert
Cuisine: American
Keyword: cookies
Servings: 18
Calories: 256kcal



  • Preheat the oven to 350 degrees Line two large baking sheets with Silpat baking mats or parchment paper. Set aside.
  • In a medium bowl, stir together the oats, flour, baking soda, and salt. Set aside.
  • Using a stand mixer or hand-held mixer, beat the butter, peanut butter, and sugars together until creamy and smooth, on medium speed. Scrape down the sides of the bowl with a spatula, if necessary. Beat in the egg and vanilla extract. Mix until well combined.
  • Add in the dry ingredients and mix on low until just until the combined. Don't over mix. Gently stir in the 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. 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.


You can easily double this recipe, I often do because more cookies is always a good idea:) 


Calories: 256kcal | Carbohydrates: 31g | Protein: 4g | Fat: 13g | Saturated Fat: 6g | Cholesterol: 25mg | Sodium: 113mg | Potassium: 86mg | Fiber: 2g | Sugar: 22g | Vitamin A: 207IU | Vitamin C: 1mg | Calcium: 33mg | Iron: 1mg