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*
Total Fat 15g 23%
Saturated Fat 7g 35%
Cholesterol 34mg 11%
Sodium 109mg 5%
Potassium 148mg 4%
Total Carbohydrates 33g 11%
Dietary Fiber 1g 4%
Sugars 20g
Protein 5g 10%
Vitamin A 5.1%
Vitamin C 0.1%
Calcium 5.2%
Iron 6.5%
* Percent Daily Values are based on a 2000 calorie diet.