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Fudgy s'mores brownies topped with marshmallows and graham crackers

Fudgy S’mores Brownies


  • Author: Sarah Mendez
  • Total Time: 5 hours 10 minutes
  • Yield: 16 brownies 1x
  • Diet: Vegetarian

Description

These Fudgy S’mores Brownies bring all the best parts of campfire s’mores—graham crackers, gooey marshmallows, and rich chocolate—into one irresistible, oven-baked treat. Perfectly chewy, delightfully indulgent, and totally crave-worthy!


Ingredients

Scale

Essentials:

  • 45 honey graham cracker sheets
  • 10 tablespoons unsalted butter, at room temperature
  • 2/3 cup dark chocolate chips
  • 1/2 cup dark brown sugar, packed
  • 1/2 cup granulated sugar
  • 2 large eggs + 1 large egg yolk
  • 2 teaspoons vanilla extract
  • 2/3 cup all-purpose flour
  • 1/4 cup unsweetened Dutch cocoa powder
  • 1/4 teaspoon fine sea salt

Optional Add-Ons:

  • 1 teaspoon espresso powder
  • 1/2 cup chopped dark chocolate

For Marshmallow Topping:

  • 1/3 cup water (for gelatin)
  • 1 tablespoon unflavored gelatin
  • 1 cup granulated sugar
  • 1/4 cup agave syrup
  • 1/4 cup water (for sugar syrup)
  • 1 teaspoon vanilla bean paste
  • Pinch of salt
  • Powdered sugar, for dusting

Substitutions:

  • Butter → coconut oil or vegetable oil
  • Dark chocolate → semi-sweet or milk chocolate
  • Eggs → flaxseed eggs (1 tbsp flax + 2.5 tbsp water per egg)
  • Sugar → coconut sugar

Instructions

  1. Preheat Oven: Preheat to 350°F (180°C).
  2. Prepare Pan: Line an 8×8-inch pan with parchment paper.
  3. Base Layer: Place 4-5 sheets of graham crackers on the bottom of the pan.
  4. Melt Butter & Chocolate: Melt butter and chocolate chips in a microwave or double boiler until smooth.
  5. Mix Wet Ingredients: In a bowl, whisk brown sugar, granulated sugar, eggs, yolk, and vanilla extract until smooth.
  6. Combine Mixtures: Whisk in the melted butter-chocolate mixture until fully incorporated.
  7. Mix Dry Ingredients: In another bowl, combine flour, cocoa powder, salt, and espresso powder (if using).
  8. Combine Wet & Dry: Gently fold dry ingredients into wet mixture. Do not overmix.
  9. Pour Batter: Spread brownie batter evenly over graham crackers.
  10. Bake: Bake for 30-35 minutes. Cool for 1-2 hours after baking.
  11. Start Marshmallow: In a stand mixer bowl, add 1/3 cup water and sprinkle in gelatin.
  12. Boil Sugar Syrup: Heat sugar, agave, and 1/4 cup water in a pot until 240-250°F (soft-ball stage).
  13. Combine Syrup & Gelatin: Slowly pour hot syrup into gelatin while mixer runs on low. Avoid touching the bowl sides.
  14. Whip Marshmallow: Increase speed and whip for 10-15 minutes until fluffy. Add vanilla paste and salt.
  15. Spread Topping: Quickly spread marshmallow over cooled brownies. Let sit 4+ hours to set.
  16. Dust & Cut: Dust with powdered sugar. Use a hot, oiled knife to slice cleanly.
  17. Toast Marshmallow: Use a kitchen torch to toast the top until golden and bubbly.

Notes

  • Let brownies cool completely before adding marshmallow to prevent melting.
  • Store in an airtight container at room temperature for 2-3 days or in the fridge for up to 5 days.
  • Use a kitchen torch for that signature toasted s’mores look!
  • Prep Time: 35 minutes
  • Cook Time: 35 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 brownie
  • Calories: 270
  • Sugar: 24g
  • Sodium: 85mg
  • Fat: 14g
  • Saturated Fat: 8g
  • Unsaturated Fat: undefined
  • Trans Fat: undefined
  • Carbohydrates: 34g
  • Fiber: 2g
  • Protein: 3g
  • Cholesterol: undefined

Keywords: fudgy s'mores brownies, marshmallow brownies, s'mores dessert bars, homemade brownies, chocolate graham brownies, summer dessert