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peanut butter m&M cookies stacked on a white marble surface

Peanut Butter M&M Cookies

Perfectly melt in your mouth peanut butter cookies are filled with Peanut Butter M&M's. You won't be able to each just one! 

  • Total Time: 2 Hours 20 Minutes
  • Yield: 2 Dozen 1x


Units Scale


  • 188 grams (1 1/2 cup) All-Purpose Flour
  • 3/4 Teaspoon Baking Boda
  • 3/4 Teaspoon Salt
  • 2 Teaspoons Cornstarch
  • 4oz (1/2 cup /1 stick) Unsalted Butter, at room temp.
  • 4oz Creamy Peanut Butter
  • 100 grams (1/2 Cup) Brown Sugar
  • 50 grams (1/4 Cup) Granulated Sugar
  • 1 Large Egg, at room temp.
  • 2 Teaspoons Pure Vanilla Extract
  • 4oz (1/2 Cup) Semi-Sweet Chocolate Chips
  • 4oz (1/2 Cup) Peanut Butter M&M’s


  1. In the bowl of an electric mixer cream butter and peanut butter for 2 minutes. Add in granulated sugar and brown sugar mix for 3 minutes. Add in egg and vanilla extract, mix for another minute.
  2. In a medium bowl mix together flour, baking soda, cornstarch, and salt set aside.
  3. Gently mix in flour mixture to the wet ingredients, then fold in Peanut Butter M&M's and chocolate chunks. Scoop dough into 1.5 Tablespoons, place on a tray and cover with plastic wrap. Chill dough for 2 hours then preheat oven to 350F/180C and line a baking sheet with Silpat (affiliate link) liner, if using one.
  4. Bake for 8-10 minutes. I like to take cookies out when they look almost done and let sit in the pan for 5 minutes then transfer to wire rack to cool completely.



  • Author: Elizabeth Waterson I Confessions of a Baking Queen
  • Prep Time: 10
  • Cook Time: 10
  • Category: Dessert
  • Method: Bake
  • Cuisine: American

Keywords: peanut butter m&m cookies, peanut butter cookies, m&m cookies

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