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Peanut Butter S'mores Bars | A gluten free s'mores bar recipe with a peanut butter cookie crust, marshmallows and loads of chocolate chips!
5 from 1 vote

Peanut Butter S’mores Bars

This gluten free s'mores bar recipe has a peanut butter cookie crust, is topped with gooey miniature marshmallows and loads of chocolate chips!  These make a wonderful summer or potluck gluten free dessert recipe.

Course Dessert
Cuisine American
Prep Time 20 minutes
Cook Time 20 minutes
Total Time 40 minutes
Servings 25 servings
Calories 399 kcal
Author London


  • ¾ c. butter softened
  • ½ c. peanut butter creamy
  • ¾ c. brown sugar
  • ¼ c. white sugar
  • 2 eggs
  • 2 T. milk
  • 1 1/3 c. white rice flour
  • 2/3 c. tapioca starch
  • 1 ¼ t. xanthan gum
  • or 2 c. 1 to 1 gluten free flour instead of the above 3 ingredients
  • ½ t. salt
  • 1 t. baking soda
  • ½ c. gluten free graham crackers crushed
  • 1-12 oz. bag chocolate chips
  • 4 c. miniature marshmallows


  1. Heat oven to 350 degrees.
  2. In a large mixing bowl combine butter, peanut butter and sugars. Mix on medium-low speed for 2 minutes. Add eggs and milk and mix for 1 minute.
  3. In a separate medium-sized bowl combine white rice flour, tapioca starch, xanthan gum, salt and baking soda. Toss to combine and then slowly incorporate the dry ingredients into the butter/sugar mixture.
  4. Add graham cracker crumbs to dough and thoroughly combine.
  5. In a large, 10 x 15 inch sheet pan, completely coated in non-stick cooking spray, spread peanut butter cookie dough out evenly.
  6. Bake for 14-17 minutes, or until almost completely done. Spread entire bag of chocolate chips on almost done cookie crust and return to oven for 3 minutes.
  7. Add marshmallows and return to oven. Place oven on a High broil and broil bars for 2 minutes, paying close attention to them so they do not burn.
  8. Let bars cool completely before cutting. Be sure to use a sharp knife since the marshmallows will be gooey. If you are having trouble cutting the bars without making a sticky mess, refrigerate for at least 4 hours and then cut. Enjoy!
Nutrition Facts
Peanut Butter S’mores Bars
Amount Per Serving
Calories 399 Calories from Fat 108
% Daily Value*
Fat 12g18%
Saturated Fat 6g38%
Cholesterol 33mg11%
Sodium 154mg7%
Potassium 58mg2%
Carbohydrates 69g23%
Fiber 1g4%
Sugar 41g46%
Protein 3g6%
Vitamin A 225IU5%
Vitamin C 0.1mg0%
Calcium 32mg3%
Iron 0.7mg4%
* Percent Daily Values are based on a 2000 calorie diet.