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peanut butter cup s'mores chocolate cookie on parchment paper

Peanut Butter Cup S'mores Chocolate Cookies

When peanut butter cups and s'mores combine, you get decadent peanut butter cup s'mores chocolate cookies with gooey marshmallow and creamy peanut butter in every bite. These cookies are irresistibly fudgy, rich, and the perfect treat that will impress anyone!

Course Dessert
Cuisine American
Keyword peanut butter cup marshmallow cookies, peanut butter cup s'mores chocolate cookies, peanut butter cup s'mores cookies
Prep Time 35 minutes
Cook Time 10 minutes
Total Time 45 minutes
Servings 24 cookies
Author Monique Volz of AmbitiousKitchen.com


  • Dry ingredients:
  • 2 cups all purpose flour
  • ¾ cup unsweetened cocoa powder (I use Ghirardelli)
  • 1 teaspoon baking soda
  • ¼ teaspoon salt
  • Wet ingredients:
  • 1 cup salted butter, at room temperature
  • 1 cup packed light brown sugar
  • ¾ cup granulated sugar
  • 1 large egg
  • 1 teaspoon vanilla
  • For the mix-ins:
  • 14-16 dark chocolate peanut butter cups (I used 7 packages of Justin’s), roughly chopped and divided (about 2 cups chopped peanut butter cups)
  • 1 heaping cup mini marshmallows


  1. Preheat the oven to 350 degrees F. Line a large baking pan with parchment paper.
  2. In a large bowl, whisk together the flour, cocoa powder, baking soda and salt.
  3. In the bowl of an electric mixer, cream together butter, brown sugar and granulated sugar until light and fluffy, about 2 minutes. Next add in the egg and vanilla extract; beat again on medium speed until well combined smooth and creamy; about 1 minute longer.
  4. Add in dry ingredients and mix on low until just combined and the dough forms. Next use a wooden spoon to fold in the mini marshmallows and 1 ½ cups of chopped peanut butter cups (reserving ½ cup for topping).
  5. Use a medium cookie scoop to grab about 2 tablespoons of dough, then roll dough balls and place on a cookie sheet, leaving at least 2 inches apart from one another. Top each dough ball with 1-2 of the chopped peanut butter cup pieces; this will help to create a pretty effect so you can see the peanut butter cups and so they get nice and melty on top!
  6. Bake for 10-12 minutes or until edges begin to set and crackle. Remove and allow cookies to cool for 5-10 minutes on the baking sheet before transferring to a wire rack to finish cooling. Makes 2 dozen cookies.

Recipe Notes

Learn exactly how to freeze this peanut butter cup s'mores cookie dough and baked cookies with our tutorial here!