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Horizontal image of portioned individual square baked goods on a parchment paper next to bottles of beer.

Guinness Chocolate Brownies

  • Author: Nikki Cervone
  • Total Time: 2 hours, 30 minutes
  • Yield: 16 brownies 1x


These intensely rich and indulgent Guinness stout brownies should be reserved for the most serious chocolate cravings.


  • 1 11.2-ounce bottle stout beer (Like Guinness Drought Stout or Guinness Extra Stout)
  • 12 ounces bittersweet chocolate bars, chopped
  • 1 cup (2 sticks) unsalted butter, cubed
  • 1 1/2 cups granulated sugar
  • 3 large eggs, room temperature
  • 1 teaspoon vanilla extract
  • 1 teaspoon kosher salt
  • 3/4 cup all-purpose flour


  1. Preheat the oven to 350°F. Lightly grease a 9-by-9-inch square baking pan with cooking spray, and line it with parchment paper.
  2. Bring the stout to a boil over medium-high heat in a medium saucepan. Continue to boil until it has reduced to approximately 1/2 cup, about 20-25 minutes. Watch carefully so it doesn’t boil over. Remove from the heat and set aside to cool slightly.
  3. Prepare a double boiler. Fill a separate medium saucepan a third of the way full with water and place on the stovetop over low heat. When the water begins to gently simmer and steam, place the chocolate and butter in a heatproof bowl and set over the pot, ensuring the bottom of the bowl does not make contact with the water.
  4. Heat the chocolate and butter, stirring continuously with a heatproof spatula, until they are completely melted and a smooth mixture forms, about 2-5 minutes. Remove the bowl from the pot and set aside to cool slightly for 1-2 minutes.
  5. In a large mixing bowl, whisk together the sugar, eggs, vanilla, and salt until thoroughly combined. Whisk in the melted chocolate until thoroughly combined. Whisk in the reduced Guinness until thoroughly combined.
  6. Fold the flour into the batter, mixing just until no white streaks remain. Do not overmix.
  7. Immediately pour the batter into the prepared pan. Transfer the pan to the oven, and bake for 40-45 minutes, or until a toothpick inserted into the center comes out with very moist crumbs attached.
  8. Remove the pan from the oven and place on a cooling rack. Allow to cool significantly before cutting and serving, at least 1 hour.
  • Prep Time: 30 minutes
  • Cook Time: 1 hour
  • Category: Brownies
  • Method: Stovetop/Baking
  • Cuisine: Dessert

Keywords: brownies, chocolate, Guinness, stout