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Gooey S’mores Brownie Bars Easy Recipe with Graham Cracker Crust

Gooey S’mores Brownie Bars - featured image

These Gooey S’mores Brownie Bars combine nostalgic campfire flavors of s’mores with rich, fudgy brownies and a crunchy graham cracker crust for a comforting and indulgent dessert.

Ingredients

Scale
  • 1 1/2 cups graham cracker crumbs (about 10 full sheets, finely crushed)
  • 6 tablespoons unsalted butter, melted
  • 1/4 cup granulated sugar
  • 1/2 cup unsalted butter, melted
  • 1 cup granulated sugar
  • 2 large eggs, room temperature
  • 1 teaspoon vanilla extract
  • 1/3 cup unsweetened cocoa powder
  • 1/2 cup all-purpose flour
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking powder
  • 2 cups mini marshmallows
  • Optional: 1/2 cup semi-sweet chocolate chips or chunks

Instructions

  1. Preheat oven to 350°F (175°C). In a medium bowl, mix graham cracker crumbs, melted butter, and granulated sugar until combined and mixture holds together when pressed.
  2. Press crust mixture firmly and evenly into the bottom of a greased or parchment-lined 8×8-inch baking pan.
  3. Bake crust for 8-10 minutes until just set and beginning to turn golden around edges.
  4. While crust bakes, whisk melted butter and sugar in a large bowl until smooth.
  5. Add eggs one at a time, beating well after each addition, then stir in vanilla extract.
  6. Sift together cocoa powder, flour, salt, and baking powder; fold dry ingredients gently into wet mixture without overmixing.
  7. Remove crust from oven and pour brownie batter evenly over warm crust.
  8. If using, sprinkle chocolate chips or chunks over batter.
  9. Generously sprinkle mini marshmallows evenly on top of batter layer.
  10. Return pan to oven and bake for 20-25 minutes until brownie layer is set but still soft in center and marshmallows are golden and slightly crisp.
  11. Watch closely during last 5 minutes to prevent marshmallows from burning.
  12. Allow bars to cool completely in pan before slicing; for easier slicing, chill in fridge for 30 minutes after cooling.

Notes

Press crust firmly to avoid crumbly bars. Do not overmix brownie batter to keep it fudgy. Watch marshmallows closely to prevent burning; broil briefly if needed. Use room temperature eggs for better batter consistency. For gluten-free, substitute flour and graham crackers accordingly. Dairy-free options include coconut oil and vegan marshmallows.

Nutrition

Keywords: s’mores, brownie bars, graham cracker crust, marshmallows, chocolate, easy dessert, gooey brownies, campfire flavors