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Ultimate Gooey S’mores Brownies Recipe with Crispy Graham Cracker Topping Made Easy

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These Ultimate Gooey S’mores Brownies combine a crispy graham cracker topping, gooey marshmallow middle, and rich chocolate base for a comforting treat that captures campfire magic without a campfire.

Ingredients

Scale
  • 1 cup (226g) unsalted butter, melted
  • 2 cups (400g) granulated sugar
  • 4 large eggs, room temperature
  • 1 teaspoon pure vanilla extract
  • 1 cup (85g) unsweetened cocoa powder (Dutch-processed if available)
  • 1 cup (125g) all-purpose flour (can substitute with gluten-free flour blend)
  • ½ teaspoon salt
  • ½ teaspoon baking powder
  • 2 cups (150g) mini marshmallows (use vegan marshmallows if needed)
  • 1 cup (100g) graham cracker crumbs
  • 2 tablespoons (28g) unsalted butter, melted
  • 2 tablespoons (25g) brown sugar
  • Optional add-ins:
  • ½ cup (90g) chocolate chips or chunks
  • ¼ cup chopped toasted nuts (pecans or walnuts)

Instructions

  1. Preheat your oven to 350°F (175°C). Lightly grease a 9×13 inch baking pan or line it with parchment paper, leaving an overhang for easy removal.
  2. In a large bowl, whisk together melted butter and granulated sugar until smooth and glossy, about 2 minutes.
  3. Add eggs one at a time, whisking well after each addition. Stir in vanilla extract.
  4. In a separate bowl, sift cocoa powder, flour, salt, and baking powder together.
  5. Gradually fold the dry ingredients into the wet mixture using a rubber spatula until no flour streaks remain.
  6. Pour half the batter into the prepared pan and spread evenly.
  7. Evenly sprinkle mini marshmallows over the batter. If using, sprinkle half of the chocolate chips or nuts now.
  8. Gently dollop remaining brownie batter over marshmallows and spread to cover as much as possible.
  9. In a small bowl, combine graham cracker crumbs, melted butter, and brown sugar. Stir until crumbs are evenly coated and slightly clumpy.
  10. Distribute the graham cracker mixture evenly over the brownie batter surface.
  11. Bake for 30–35 minutes, checking at 30 minutes. Edges should be set and center slightly soft but not liquidy. A toothpick near the edge should come out clean.
  12. Remove from oven and cool completely on a wire rack for at least 1 hour.
  13. Slice using a sharp knife warmed under hot water and wiped dry. Serve at room temperature or slightly warmed.

Notes

If marshmallows brown too fast, loosely cover pan with foil halfway through baking. Do not overmix batter to keep brownies fudgy. Use room temperature eggs for best texture. Let brownies cool completely before slicing to avoid gooey mess. For crispier topping, do not skip butter in graham cracker mixture. Vegan and gluten-free versions require substitutions and may need longer baking time.

Nutrition

Keywords: s'mores brownies, gooey brownies, graham cracker topping, marshmallow brownies, chocolate dessert, easy brownies, campfire dessert

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