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+ servings
Monster cookies

The Best Monster Cookie

This recipe makes the best soft and chewy oatmeal, peanut butter, and chocolate monster cookies that everyone will enjoy. They are the perfect after school snack, dessert, and sweet treat any time of the day. Since this recipe is flourless, these cookies are gluten-free.
5 from 1 vote
Print Recipe
Course: Cookies, Dessert
Cuisine: American
Keyword: Monster Cookie Recipe, Monster Cookies
Prep Time: 20 minutes
Cook Time: 12 minutes
Servings: 48
Calories: 152kcal


  • 1 cup Granulated Sugar
  • 1 cup Packed Brown sugar (light)
  • ½ cup Butter
  • 3 Eggs (large)
  • 1 ½ cups Peanut butter (creamy or chunky)
  • 2 teaspoons Vanilla extract
  • 2 teaspoons Baking soda
  • ¼ teaspoon Salt
  • 4 ½ cups Oats (Old Fashioned)
  • 1 cup M&Ms (mini or regular)
  • 1 cup Chocolate chips (mini or regular)
  • Extra candies for topping


  • Preheat your oven to 350 F degrees
  • Add to a large stand mixer bowl sugars and butter and cream them together.
  • Next, add eggs and beat thoroughly.
  • Add peanut butter, vanilla, baking soda, and salt mix well.
  • Slowly add the oats.
  • Mix in M&Ms and chocolate chips.
  • Line a half sheet pan with a Silpat or parchment paper.
  • Using a cookie scoop, measure out 2 Tablespoons of dough and roll it into a ball. Place cookie dough balls on the cookie sheet about 2.5" apart.
  • Place a few extra candies on the tops of the dough balls.
  • Bake cookies for 12 - 13 minutes.
    Remove from the oven and cool on the sheet pan for 5 minutes.
    Then gently transfer cookies to a wire cooling rack with a spatula.


Serving: 1g | Calories: 152kcal | Carbohydrates: 18g | Protein: 4g | Fat: 8g | Saturated Fat: 3g | Cholesterol: 16mg | Sodium: 120mg | Potassium: 89mg | Fiber: 1g | Sugar: 12g | Vitamin A: 84IU | Vitamin C: 1mg | Calcium: 18mg | Iron: 1mg
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