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Peanut Butter S’mores Bars

1 Star2 Stars3 Stars4 Stars5 Stars (2 votes, average: 5.00 out of 5)


5 from 2 reviews

  • Author: KJ & Company - Kate Poskochil
  • Total Time: 45 minutes
  • Yield: 12 servings 1x


Peanut Butter S’mores Bars are a fun twist on a classic dessert! A peanut butter cookie base is swirled together with classic s’mores ingredients: marshmallows and chocolate chunks! Each bite is perfectly gooey, sweet and full of peanut butter flavor.


  • 1 stick (8 tablespoons) butter, softened
  • 1/2 cup sugar
  • 1/2 cup brown sugar
  • 1 large egg
  • 1 cup creamy peanut butter
  • 1 teaspoon vanilla extract
  • 3/4 teaspoon salt
  • 1/2 teaspoon baking soda
  • 1 1/2 cups flour
  • 2 cups mini marshmallows
  • 4 milk chocolate candy bars (such as Hershey’s) broken into 1/2 inch pieces


  1. Preheat your oven to 350 degrees. In the bowl of an electric mixer, cream together the butter, sugar and brown sugar on medium speed until light and fluffy, about a couple minutes. Reduce the heat to low and mix in the egg until combined, wiping down the sides of the bowl.
  2. Mix in the peanut butter and vanilla until smooth. Add in the salt, baking soda and flour and mix on low speed until a cookie dough forms.
  3. Use a rubber spatula to fold in the mini marshmallows and chocolate chunks. Evenly press the cookie dough into the bottom of a greased 9×13 ban.
  4. Bake for 25-30 minutes, or until the top is golden brown and the center is set. Allow to cool before slicing and serving. Enjoy!


  • Crunchy peanut butter can be used if desired.
  • Nutritional information for this recipe is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Category: Dessert
  • Method: Baking


  • Serving Size: 1
  • Calories: 398
  • Sugar: 28.1g
  • Sodium: 371mg
  • Fat: 23g
  • Carbohydrates: 45.6g
  • Fiber: 2.7g
  • Protein: 8.4g
  • Cholesterol: 35mg

Keywords: Peanut Butter S'mores Bars

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