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Gooey S’mores Cookie Bars

Close-up of a gooey s'mores cookie bar slice on a white plate, featuring melted chocolate and toasted marshmallows.

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Easy s’mores cookie bars with a graham cracker crust, chocolate, and marshmallows. Perfect for parties and potlucks.

Ingredients

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  • 1 cup (2 sticks) unsalted butter, softened
  • 1 cup granulated sugar
  • 1 cup packed light brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 3 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 12 ounces semi-sweet chocolate chips, divided
  • 1 cup chopped milk chocolate or chocolate chunks
  • 1 cup marshmallow creme or mini marshmallows
  • 1 cup crushed graham crackers

Instructions

  1. Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
  2. In a large bowl, cream together the softened butter, granulated sugar, and brown sugar until light and fluffy.
  3. Beat in the eggs one at a time, then stir in the vanilla extract.
  4. In a separate bowl, whisk together the flour, baking soda, and salt.
  5. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
  6. Stir in 8 ounces of the chocolate chips and the chopped milk chocolate.
  7. Press half of the cookie dough evenly into the bottom of the prepared baking pan.
  8. Sprinkle the crushed graham crackers over the dough.
  9. Dollop the marshmallow creme evenly over the graham crackers, or sprinkle with mini marshmallows.
  10. Scatter the remaining 4 ounces of chocolate chips over the marshmallow layer.
  11. Carefully spread the remaining cookie dough over the toppings.
  12. Bake for 25-30 minutes, or until the edges are golden brown and the center is set.
  13. Let the bars cool completely in the pan before cutting into squares.

Notes

  • For cleaner slices, chill the bars in the refrigerator for at least 30 minutes before cutting.
  • You can add other mix-ins like nuts or different types of chocolate.
  • These bars can be made ahead and stored in an airtight container at room temperature for up to 3 days.

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