Go Back
Print Pin
5 from 2 votes

Monster Peanut Butter Oatmeal Cookies

These Monster Peanut Butter Oatmeal Cookies have it ALL! Each bite is filled with chewy oats, peanut butter, chocolate chips and M&M's! Truly the perfect cookie!
Course Dessert
Cuisine American
Keyword monster peanut butter oatmeal cookies, outmeal cookie
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Servings 36
Calories 189kcal
Author Trish - Mom On Timeout


  • ½ cup creamy peanut butter I used Skippy Naturals
  • ½ cup unsalted butter softened
  • 1 cup brown sugar
  • ½ cup granulated sugar
  • 1 teaspoon baking soda
  • ½ teaspoon salt
  • 1 teaspoon ground cinnamon optional
  • 2 eggs room temperature
  • 1 teaspoon vanilla extract
  • 1 ½ cups all-purpose flour
  • 3 cups oats quick oats are fine
  • ¾ cup semi-sweet chocolate chips
  • ¾ cup peanut butter chocolate chips
  • ¾ cup mini M&M's


  • Preheat oven to 350F.
  • Line baking sheet with parchment paper or silicone baking mat and set aside.
  • Beat peanut butter and butter together in a large mixing bowl until thoroughly combined.
  • Cream in brown sugar and granulated sugar.
  • Beat in baking soda, salt, and cinnamon.
  • Add eggs one at a time, beating well after each addition.
  • Beat in vanilla extract.
  • Stir in flour and oats until combined.
  • Stir in chocolate chips, peanut butter chips, and M&M's.
  • Scoop out using an ice cream scoop or large cookie dough scoop. You want about 1/4 cup of dough per cookie.
  • Bake for 9-11 mins or until lightly golden brown on top. Let cookies rest for 10 minutes on baking sheet before removing to a wire rack to cool.
  • Store cookies in an airtight container for up to 4 days.


Calories: 189kcal | Carbohydrates: 25g | Protein: 4g | Fat: 9g | Saturated Fat: 4g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 2g | Trans Fat: 1g | Cholesterol: 17mg | Sodium: 96mg | Potassium: 87mg | Fiber: 2g | Sugar: 15g | Vitamin A: 104IU | Vitamin C: 1mg | Calcium: 21mg | Iron: 1mg