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Overhead view of Soft & Chewy Oatmeal Monster M&M Cookies on a plate

Soft and Chewy Oatmeal Monster Cookies

Soft and Chewy Oatmeal Monster Cookies are filled with peanut butter, oats, white chocolate chips, and M&Ms.
Course Dessert
Cuisine American
Keyword m&m cookies, m&m oatmeal cookie recipe
Prep Time 15 minutes
Cook Time 12 minutes
Resting Time 30 minutes
Total Time 57 minutes
Servings 26 cookies
Calories 293 kcal


  • 1 1/3 cup all-purpose flour spoon & sweet method
  • 1 teaspoon baking powder
  • 3/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 1 cup unsalted butter melted
  • 1 1/3 cup dark brown sugar packed
  • 2 large eggs room temperature
  • 3/4 cup creamy peanut butter I used Skippy Natural
  • 2 teaspoons vanilla extract
  • 3 1/4 cup quick oats not old fashioned
  • 1 cup white chocolate chips
  • 1 cup mini M&M chips


  1. In a large bowl, whisk together the flour, baking soda, baking powder and salt. Stir in the oats.
  2. In a medium bowl, whisk the melted butter and brown sugar together until smooth & combined. Whisk in the vanilla, peanut butter and then the egg until well incorporated. Pour the wet ingredients into the dry ingredients and gently mix together with a wooden spoon or spatula until just combined. Fold in the white chocolate chips and M&M's reserving 1/4 cup of each for topping if desired. Place dough in the fridge to chill for 30 minutes.
  3. Once dough is chilled, preheat oven to 350 F degrees. Line two cookie sheets with parchment paper or silicone baking mats.
  4. Using a large cookie scoop or measure and roll 2-1/2 tablespoon size cookie dough balls. Place about 8 balls onto prepared cookie sheet.

  5. Bake in preheated oven for 10-12 minutes for a soft and underbaked cookie. they will continue to bake on the cookie sheet. Press a piece or two of the remaining chocolate chips and M&M's into each cookie if desired. Cool on the cookie sheet for 10 minutes before transferring to a wire rack.
Nutrition Facts
Soft and Chewy Oatmeal Monster Cookies
Amount Per Serving (2 cookies)
Calories 293 Calories from Fat 135
% Daily Value*
Fat 15g23%
Saturated Fat 7g35%
Cholesterol 34mg11%
Sodium 109mg5%
Potassium 148mg4%
Carbohydrates 33g11%
Fiber 1g4%
Sugar 20g22%
Protein 5g10%
Vitamin A 255IU5%
Vitamin C 0.1mg0%
Calcium 52mg5%
Iron 1.2mg7%
* Nutrition facts are provided as a courtesy using the WPRM recipe calculator. It is best to make your own calculations to ensure accuracy. We expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website. Percent Daily Values are based on a 2000 calorie diet.