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a chocolate chip marshmallow cookie bar cut from the pan.
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5 from 1 vote

Chocolate Chip Marshmallow Cookie Bars

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The combination of graham crackers, melted chocolate, and gooey marshmallows in these chocolate chip marshmallow cookie bars will bring back your fond campfire memories. All without the smoke.
Prep Time25 minutes
Cook Time35 minutes
Total Time1 hour
Course: Dessert
Cuisine: Unspecified
Servings: 16 bars
Calories: 276kcal

Equipment

  • Stand or hand mixer, optional
  • Food processor, optional

Ingredients

  • cup (5.3 ounces or 151 grams) unsalted butter plus more for greasing the pan
  • 6 whole graham crackers (or 3.2 ounces or 90 grams graham cracker crumbs)
  • cup (3.0 ounces or 83 grams) bleached all-purpose flour
  • ½ teaspoon salt
  • ½ teaspoon baking powder
  • ¼ teaspoon baking soda
  • ½ cup (3.4 ounces or 96 grams) dark brown sugar
  • 1 large egg
  • 1 egg yolk
  • ½ teaspoon vanilla extract
  • 8 ounces semisweet or bittersweet chocolate chips

Topping

  • 2 whole graham crackers, broken into pieces
  • ½ cup mini marshmallows
  • 4 ounces semisweet or bittersweet chocolate chips

Instructions

  • Preheat the oven to 325°F. Grease an 8 inch or 9 inch square baking pan.
  • Brown the butter by heating it on medium-low in a small pot. The butter will melt and bubble. Turn off the heat when the bubbling stops. The butter should have darkened and smell slightly nutty. Remove from heat and let cool slightly.
    ⅔ cup (5.3 ounces or 151 grams) unsalted butter
  • Pulverize the graham crackers in a food processor or by hand and add it to a medium bowl.
    6 whole graham crackers (or 3.2 ounces or 90 grams graham cracker crumbs)
  • Sift the flour, salt, baking powder, and baking soda into the bowl with the graham crackers and whisk to mix.
    ⅖ cup (3.0 ounces or 83 grams) bleached all-purpose flour, ½ teaspoon salt, ½ teaspoon baking powder, ¼ teaspoon baking soda
  • In the bowl of a stand mixer (or another medium bowl if using a hand mixer or mixing by hand), combine the sugar and brown butter.
    ½ cup (3.4 ounces or 96 grams) dark brown sugar
  • Add in the egg and egg yolk and beat on medium speed for one minute.
    1 large egg, 1 egg yolk
  • Add the vanilla and beat on medium speed for one minute.
    ½ teaspoon vanilla extract
  • Stir in the dry ingredients by hand and then add the chocolate chips and mix.
    8 ounces semisweet or bittersweet chocolate chips
  • Spread the mixture evenly in the prepared pan and bake for 30-35 minutes, until the bars start to brown and pull away from the sides of the pan, a toothpick inserted in the middle comes out clean, and the cookie feels somewhat firm.
  • Take the pan out of the oven and set the oven to broil with a rack 6 to 8 inches from the broiler.
  • While the broiler is heating, add the graham cracker pieces and then the mini marshmallows to the pan.
    2 whole graham crackers, broken into pieces, ½ cup mini marshmallows
  • Broil for 45 to 60 seconds, watching closely, until the marshmallows have achieved your ideal brownness.
  • Remove from the oven, sprinkle on the chocolate chips, and cover with foil for 5 to 10 minutes.
    4 ounces semisweet or bittersweet chocolate chips
  • These chocolate chip marshmallow cookie bars can be stored at room temperature for up to one week.

Notes

Feel free to substitute any type of chocolate - chopped or chip - that you like for the s'mores-inspired top of this cookie bar.

Nutrition

Serving: 1bar | Calories: 276kcal | Carbohydrates: 29g | Protein: 3g | Fat: 17g | Saturated Fat: 10g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 44mg | Sodium: 167mg | Potassium: 160mg | Fiber: 2g | Sugar: 17g | Vitamin A: 275IU | Vitamin C: 1mg | Calcium: 55mg | Iron: 2mg