Go Back
–+ servings
easy s'mores cookie bars cut into 12 squares on parchment paper

Easy S'mores Cookie Bars

Krista Stechman
Gooey marshmallow and chocolate cookie bars with graham crackers and cookie butter topped with Hershey's chocolate bars. An easy summer treat to take to all of your picnics, BBQ's and parties!
5 from 3 votes
Print Recipe Pin Recipe
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Course dessert
Cuisine american
Servings 12 people
Calories 638 kcal

Equipment

  • 1 set of mixing bowls medium + large
  • 1 8x8 inch pan
  • 1 cooling rack
  • 1 electric hand mixer or stand mixer optional

Ingredients
  

Wet Ingredients

  • 1 cup unsalted butter melted
  • 1½ cups brown sugar
  • ½ cup granulated sugar
  • ½ cup cookie butter
  • 2 eggs room temp
  • 1 tablespoon vanilla extract

Dry Ingredients

  • 2 cups all purpose flour
  • 1 tsp baking powder
  • ¾ tsp kosher salt

Mix-Ins

  • 6 oz semi sweet chocolate chips

Additional Layers

  • 7½ oz marshmallow fluff
  • 1 oz graham crackers crumbled

Toppings

  • 5 oz hershey's chocolate bar broken into pieces
  • ½ tsp flaky sea salt

Instructions
 

Mixing the Wet Ingredients

  • Preheat the oven to 350°F then line an 8x8 pan with parchment paper. Spray the pan and the top of the parchment with non-stick cooking spray
  • Mix the wet ingredients in a large bowl until well combined. You can use an electric hand mixer, stand mixer fitted with the paddle attachment or mix by hand

Mixing the Dry Ingredients

  • Whisk the dry ingredients together in a medium bowl

Making the S'mores Cookie Bars

  • Mix the dry ingredients into the wet ingredients just until almost fully combined
  • Fold in the chocolate chips
  • Press ¾ of the cookie dough into the bottom of the prepared pan. Reserve the other ¼ for later
  • Spread the marshmallow fluff evenly over the top of the cookie dough. Top with crumbled graham cracker
  • Add the remaining ¼ of the cookie dough to the top and spread out. It doesn't need to be completely covering the top. It's good to have some open spaces for the marshmallow to peak through
  • Bake 35-40 minutes. During the last 5 minutes of baking add the Hershey's chocolate bar pieces just so they melt on top
  • Remove them from the oven and sprinkle with flaky sea salt. Let them COOL COMPLETELY on a wire rack before cutting. Once cooled, remove them from the pan by pulling up on the parchment paper
  • Cut into 9 or 12 squares and serve room temperature

Notes

  • Do not over bake! The marshmallow fluff with become black and the cookie bar will dry out.
  • Do not over mix. Be gentle when mixing the dry ingredients into the wet. Your Easy S'mores Cookie Bars can become dense and dry with over mixing.
  • LET THEM COOL COMPLETELY before cutting. If you don't allow the cookie bars to cool completely then they will fall apart into one big mess.
  • If you prefer dark chocolate chips over semi sweet chocolate chips then use them! They're delicious both ways.
  • Make these Easy S'mores Cookie Bars a day ahead of time when taking them to a party. It saves time and they're just as delicious the next day.
  • Be sure to spread the marshmallow fluff layer across all of the cookie dough layer.
  • When adding the last ¼ of the cookie dough on top, it doesn't need to fully cover. Leave some spots where the marshmallow cream is peaking through.
  • Cut these bars whatever size you like. I typically cut them into 12 pieces. They are very rich.

Nutrition

Calories: 638kcalCarbohydrates: 86gProtein: 6gFat: 31gSaturated Fat: 17gPolyunsaturated Fat: 1gMonounsaturated Fat: 7gTrans Fat: 1gCholesterol: 69mgSodium: 318mgPotassium: 244mgFiber: 3gSugar: 58gVitamin A: 524IUCalcium: 74mgIron: 4mg
Tried this recipe?Let us know how it was!