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+ servings
s'mores cookie bars cut on a piece of parchment paper. The marshmallow cream is gooey.
5 from 4 votes

S'Mores Cookie Bars

Amazing S'Mores Cookie Bars, made from buttery graham cracker cookie dough swirled with marshmallow creme, and two types of chocolate.
Author Diana
Servings 12 bars
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes

Equipment

Ingredients

  • 2 ¾ cups (330 g) all-purpose flour
  • 1 cup graham cracker crumbs
  • 1 teaspoon baking soda
  • ½ teaspoon baking powder
  • ½ teaspoon salt
  • 1 cup (225 g) unsalted butter softened to room temperature
  • ½ cup (100 g) granulated sugar
  • ½ cup (100 g) light brown sugar packed
  • 2 large eggs at room temperature
  • 1 ½ teaspoons pure vanilla extract
  • 14 ounces (400 g) marshmallow creme 2 jars
  • 1 ½ cups (255 g) milk chocolate chips divided (plus more for topping if desired)
  • 3 bars Hershey’s bars broken into pieces, divided
  • ¼ cup (12 g) mini marshmallows for topping, optional

Instructions

  • Preheat the oven to 350°F/180°C or 160°C fan oven, and line a 9x13 (approx. 23×33 cm) baking pan with parchment paper. Lightly grease it with cooking spray and set aside.
  • In a large mixing bowl, mix together the flour, graham cracker crumbs, baking soda, baking powder, and salt. Set aside.
  • In the bowl of a stand mixer, cream the butter and both sugars until smooth and fully combined. Then add the eggs and vanilla extract and continue to beat until just incorporated.
  • Gradually add the dry ingredients and beat on medium speed until there are only minimal streaks of flour in the dough.
  • Fold in 1 cup of chocolate chips until evenly mixed in.
  • Using your fingers, press about ¾ of the cookie dough into the bottom of the parchment lined baking pan. Break apart half the amount of Hershey’s bars and evenly layer it on top.
  • Spread the marshmallow creme on top and then sprinkle with the remaining chocolate chips.
  • Take pieces of the remaining cookie dough and flatten it out with your hands then place the pieces in a single layer on top of the chocolate chips, leaving small gaps for the marshmallows to pop out.
  • Bake for 25 minutes. Remove from the oven and top with the remaining pieces of Hershey’s bars, mini marshmallows, and chocolate chips. Then bake for an additional 10-15 minutes or until the edges are lightly browned and the top part of the cookie looks set.
  • Allow the bars to cool in the baking pan on a wire rack at room temperature for 30 minutes to an hour.
  • Cut into 12 squares and serve.

Notes

  • Avoid Overmixing. The cookie dough only needs to be mixed until the flour is incorporated. Any more than that and you may end up with tough, dry s'mores bars
  • To Halve this Recipe: Cut the recipe in half and bake in an 8x8-inch baking pan. Reduce the initial oven time by 10-15 minutes.
  • Make fresh graham cracker crumbs. You can buy pre-made graham cracker crumbs at the store, but they really have the best flavor and texture if you make them yourself. Use a food processor, or add graham crackers to a ziplock bag and crush them with a rolling pin.
  • Store in a single layer or with parchment paper in between layers to keep the bars from sticking together. 
  • Keep in an airtight container for 2 days at room temperature, 5 days in the fridge, or up to 3 months in the freezer. 

Nutrition

Serving: 1bar | Calories: 705kcal | Carbohydrates: 106g | Protein: 7g | Fat: 32g | Saturated Fat: 19g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 73mg | Sodium: 270mg | Potassium: 160mg | Fiber: 3g | Sugar: 68g | Vitamin A: 583IU | Vitamin C: 0.1mg | Calcium: 66mg | Iron: 3mg