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Chocolate Stout & Marshmallow S'mores Bars

Decadent, rich chocolate and marshmallow S'mores bars have a grown up twist made with Chocolate Stout and a touch of Espresso powder.
Prep Time15 mins
Cook Time22 mins
Total Time37 mins
Servings: 12
Author: CJ


  • 1 package graham crackers ~roughly 9 - 10 graham crackers
  • 2 tablespoons brown sugar
  • 3 tablespoons butter melted
  • 3 eggs
  • 1/2 teaspoon Vanilla bean paste
  • 1 cup white sugar
  • ½ cup brown sugar
  • ½ cup dark chocolate chips
  • 1 stick butter
  • 1 cup cocoa powder
  • 1/2 teaspoon Espresso powder see notes
  • ½ teaspoon salt
  • ½ cup flour
  • ¾ cup chocolate stout beer
  • 35 large marshmallows


  • Preheat oven to 350.
  • Add the graham crackers and brown sugar into a food processer and process until nothing is left but crumbs. Remove the stopper from the food processor lid, and with the food processor on, add the 3 tablespoons of melted butter, continuing to process it until the mixture resembles wet sand.
  • Add the crumb mixture to a greased 9 x 13 pan, and distribute evenly and pressing firmly into place.
  • In a medium-sized bowl, beat the eggs, vanilla bean paste and both sugars on medium-high until well combined, about 3 minutes.
  • In a microwave safe bowl, add the chocolate chips and the butter. Microwave on high for 30 seconds. Stir and repeat until both are melted and combined well. Add the chocolate mixture to the egg and sugar mixture and beat until thoroughly combined.
  • In a separate medium-sized bowl, mix the cocoa powder, Espresso powder, salt and flour until well combined. Add the dry ingredients to the wet ingredients and stir until just combined. Make sure that all flour and powder lumps have dissipated and are thoroughly mixed in, with no remaining lumps.
  • Add the beer and stir, until just combined.
  • Pour the batter evenly over the graham cracker crust.
  • Place marshmallows in even rows across the top, leaving a 1/2 inch boarder along the edge and between each marshmallow.
  • Bake at 350 for 22 minutes or until the marshmallows are golden brown.
  • You still want the bars to be soft. Don't over bake, they will continue to set as they cool.


*The Espresso powder is completely optional - it will add a slight hint of coffee flavor. If you aren't a fan of coffee or espresso, just omit this ingredient.