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Ultimate Toasted S’mores Brownie Bars

toasted smores brownie bars - featured image

These Ultimate Toasted S’mores Brownie Bars combine a rich, fudgy brownie base with toasted mini marshmallows and crunchy graham cracker crumbs for a perfect summer dessert that’s quick and easy to make.

Ingredients

Scale
  • 1/2 cup (115g) unsalted butter, melted
  • 1 cup (200g) granulated sugar
  • 2 large eggs, room temperature
  • 1 teaspoon pure vanilla extract
  • 1/3 cup (35g) unsweetened cocoa powder
  • 1/2 cup (65g) all-purpose flour
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking powder
  • 1 1/2 cups mini marshmallows
  • 3/4 cup graham cracker crumbs (about 6 full sheets crushed finely)
  • 1/2 cup semi-sweet chocolate chips or chunks

Instructions

  1. Preheat your oven to 350°F (175°C). Grease your 9×9 inch baking pan lightly with butter or non-stick spray.
  2. In a large bowl, whisk together the melted butter and sugar until combined and shiny, about 1-2 minutes. Add the eggs one at a time, whisking well after each addition. Stir in the vanilla extract.
  3. In a separate bowl, sift together the cocoa powder, flour, salt, and baking powder.
  4. Gradually fold the dry ingredients into the wet mixture using a rubber spatula. Fold gently until just combined—do not overmix.
  5. Pour the batter into the prepared pan, smoothing the top with the spatula. Sprinkle the graham cracker crumbs evenly over the surface, then scatter chocolate chips across the top.
  6. Bake for 20-25 minutes until the edges pull away slightly and a toothpick inserted in the center comes out with a few moist crumbs.
  7. Remove from oven and immediately top with mini marshmallows, spreading them evenly in a single layer. Place under the broiler for 1-3 minutes, watching carefully until marshmallows puff up and toast golden brown with some darker spots.
  8. Let the bars cool on a wire rack for at least 30 minutes before cutting.

Notes

Keep a close eye when broiling marshmallows to avoid burning. Mini marshmallows toast more evenly than jumbo ones. For gluten-free, substitute flour with almond flour or gluten-free baking blend. For dairy-free, use coconut oil and dairy-free chocolate and marshmallows. Adding a tablespoon of instant espresso powder can intensify chocolate flavor. Fresh berries can be added before broiling for a twist.

Nutrition

Keywords: s’mores, brownie bars, toasted marshmallows, summer dessert, 4th of July dessert, easy dessert, chocolate, graham crackers