Monster M & M Cookies

Prep Time: 10 minutes
Cook Time: 10 minutes
Total Time: 20 minutes
Servings: 16 cookies
Thick and Chewy Monster M & M Cookies loaded with chocolate chips, M & M’s, peanut butter, and oats! They take only 20 minutes to make!


  • 1/2 cup unsalted butter softened
  • 1 cup light brown sugar
  • 1/2 cup creamy peanut butter
  • 1 teaspoon vanilla extract
  • 1 whole egg
  • 3/4 cup all purpose flour
  • 1/4 teaspoon salt
  • 1 teaspoon baking soda
  • 1 1/2 cups old fashioned oats
  • 1 cup M & M's
  • 1/2 cup semi-sweet chocolate chips


  1. Preheat oven to 350 degrees.
  2. In a stand mixer with the paddle attachment cream butter and sugar until light and fluffy, about 3 minutes.
  3. Add in peanut butter and mix for 1-2 minutes.
  4. Add in vanilla and egg. Mix until combined.
  5. Combine flour, salt and baking soda in a small bowl.
  6. Add the dry ingredients to the batter in two parts with the stand mixer on the lowest speed. Mix for a little less than a minute. Do not over mix.
  7. Fold in old fashioned oats, M & M's and chocolate chips.
  8. Portion dough into 16-18 cookies and place on a silicone baking mat on top of a baking sheet.
  9. Bake cookies for 11-13 minutes or until lightly golden brown and firm on the edges.
  10. Remove from the oven and let set for 3-4 minutes.
  11. Transfer to a cooling rack to cool completely.
  12. Cookies can be stored in an airtight container at room temperature for 3-5 days (if they last that long). You can always freeze the cookies for up to 3-4 months.

Recipe Notes

Adapted from Love Grows Wild

Course: Dessert
Cuisine: American
Keyword: Easy Desserts, Holiday Baking, Holiday Cookies, Monster M & M Cookies