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A tray of s'mores brownies with a spatula resting inside and several brownies missing.
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5 / 6 votes

S'mores Brownies

These s'mores brownies, layered with bittersweet chocolate brownies, a graham cracker crust, and marshmallows, are as gooey, chocolatey, and messy as the name suggests. Here's how to make them.
Prep Time25 minutes
Cook Time35 minutes
Total Time1 hour
Course: Dessert
Cuisine: American
Servings: 12 servings
Calories: 452

Ingredients

  • 2 sticks (8 oz) unsalted butter, plus more for the baking dish
  • 10 ounces bittersweet chocolate, finely chopped
  • 1 cup granulated sugar
  • 3/4 cup firmly packed light brown sugar
  • 4 large eggs
  • 2 teaspoons vanilla extract
  • 1 teaspoon kosher salt
  • 1 1/2 cups cake flour
  • 3 tablespoons natural cocoa powder
  • About 6 graham crackers, roughly crushed with your hands
  • About 12 jumbo marshmallows
US - Metric

Instructions

  • Preheat the oven to 350°F (176°C) Position an oven rack in the center position and generously butter a 9-by-13-inch baking dish.
  • In a saucepan over low heat, combine the butter and chocolate, stirring often, until both melt, about 4 minutes.
  • Remove the pan from the heat and whisk in the granulated and brown sugars. Then whisk in the eggs, 1 at a time, whisking well after each addition. Whisk in the vanilla and salt.
  • Sift the flour and cocoa over the chocolate mixture and, using a rubber spatula, stir just until blended. Stir in the crumbled graham crackers.
  • Scrape the batter into the prepared baking dish and spread it evenly. Top with the marshmallows, plopping them an even distance apart from one another.
  • Bake the brownies until a toothpick inserted in the center comes out almost but not quite completely clean, 35 to 45 minutes. The brownies should be fudgy but not liquidy.
  • Let the brownies cool completely in the baking dish on a wire rack. (This cooling part is paramount, as it allows the brownies, which will be on the verge of still being gooey, to set. Otherwise, you may very well find yourself cutting into a big puddle of warm goo. If you can withstand temptation, allow the brownies to rest overnight.)

    ☞ TESTER TIP: To make it easier to cut through the marshmallowy awesomeness, fill a tall glass with very hot water and have a paper towel handy. Dip your knife in the water and wipe it clean each time before you cut through the brownies.

  • Cut the brownies into big squares, allowing one big blob of marshmallow per brownie. We think you can take it from here.

Nutrition

Serving: 1portion | Calories: 452kcal | Carbohydrates: 81g | Protein: 7g | Fat: 12g | Saturated Fat: 6g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 64mg | Sodium: 291mg | Fiber: 3g | Sugar: 55g