Ohhhh the depth of flavor in these Extra Dark Guinness® Brownies! You just can’t believe the rich chocolate flavor permeating these wonderfully fudgy treats! Enhanced with espresso powder, malty stout, and floral vanilla, the chocolatey goodness here can’t be denied! Whether you are making Extra Dark Guinness Brownies for St. Patrick’s Day or just for fun, you really can’t go wrong with this dessert on the table.


  • 1 cup all-purpose flour
  • 3/4 cup unsweetened cocoa powder
  • 1 tablespoon instant espresso powder
  • 1 teaspoon kosher salt
  • 1 (11.2-ounce) bottle Guinness beer, or other stout beer
  • 1 1/2 sticks unsalted butter, cut into pieces
  • 4 ounces bittersweet chocolate, chopped
  • 1 1/2 cups granulated sugar
  • 5 large eggs
  • 1 tablespoon pure vanilla extract
  • 2 teaspoons flaky sea salt, for topping
  • 1 tablespoon confectioners’ sugar, for garnish


Step 1 –Preheat the oven to 350 degrees F.

Step 2 –Coat a 9×9-inch baking pan with cooking spray and line the bottom with parchment paper, leaving a 2-inch overhang on two of the sides.

Step 3 –Coat the parchment paper with cooking spray.

Step 4 –In a medium bowl, add the flour, the cocoa powder, the espresso powder, and the kosher salt and whisk to combine.

Step 5 –In a medium saucepan, slowly add the beer while trying to make as little foam as possible. Holding the pan at an angle and slowly pouring the beer down the side will help.

Step 6 –Place the saucepan over high heat and bring the beer to a boil.

Step 7 –Reduce the heat to medium-low and simmer the beer until thickened and reduced to about 1/3 cup, about 12-13 minutes. You can carefully transfer the beer to a measuring cup to see if it is reduced enough.

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Step 8 –Add the butter to the reduced beer and whisk constantly until melted, about 1 minute.

Step 9 –Add the chocolate to the beer-butter mixture and whisk constantly until melted and smooth, about 2 minutes.

Step 10 –Transfer the pan from the heat and whisk in the granulated sugar until combined.

Step 11 –Add the eggs, 1 at a time, and beat well after each addition.

Step 12 –Add the vanilla to the beer mixture and stir until just combined.

Step 13 –Add the flour mixture to the beer mixture and slowly stir until combined. Make sure not to overmix or to let the flour spill out of the pan.

Step 14 –Pour the batter into the prepared pan.

Step 15 –Bake until the brownies are set on top, they have slightly pulled away from the sides, and a toothpick inserted into the center comes out with just a few moist crumbs, about 30-35 minutes.

Step 16 –Sprinkle the brownies with the flaky sea salt.

Step 17 –Let the brownies cool for 30 minutes.

Step 18 –Use the parchment paper overhang to transfer the brownies from the pan to a cutting board and let them cool completely, about 30 minutes.

Step 19 –Use a fine-mesh sieve to dust the confectioners’ sugar over the top of the brownies.

Step 20 –Slice and serve.