Print

Guinness Brownies with Frosting

Warm, fudgy brownies with a subtle roasted stout flavor and a creamy espresso-kissed frosting.

Ingredients

Scale
  • 1 bottle (11.2 to 12 ounces) Guinness Draught Stout beer, reduced to concentrate
  • 3/4 cup unsalted butter
  • 8 ounces semi-sweet chocolate, coarsely chopped
  • 1 and 1/4 cups granulated sugar
  • 3 large eggs, at room temperature
  • 1 teaspoon pure vanilla extract
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 1/2 teaspoon espresso powder (optional)
  • 1/2 cup unsalted butter, softened for frosting
  • 2 cups confectioners’ sugar
  • 2 to 3 tablespoons reduced Guinness for frosting
  • 1 teaspoon espresso powder for frosting
  • 1/2 teaspoon pure vanilla extract for frosting
  • 1/4 teaspoon salt for frosting

Instructions

  1. Reduce the Guinness by boiling it in a saucepan until it reduces to 2/3 cup, about 12 to 15 minutes. Cool for about 10 minutes.
  2. Prepare the oven and pan by preheating to 350°F (175°C) and greasing a 9-inch square baking pan.
  3. Melt the butter and chocolate in a microwave-safe bowl in 30-second increments, whisking until smooth.
  4. Combine the granulated sugar and reduced Guinness, then whisk in eggs and vanilla until glossy.
  5. Add flour, salt, and espresso powder, whisking until just combined.
  6. Bake for 32 minutes or until a toothpick comes out with a few moist crumbs.
  7. Cool the brownies completely before frosting.
  8. Make the frosting by beating softened butter until smooth, then gradually mix in confectioners’ sugar, reduced Guinness, espresso powder, vanilla, and salt until smooth.
  9. Frost the cooled brownies and cut into squares.

Notes

Use room temperature eggs for a silkier batter. Store covered at room temperature for up to 1 week.

Nutrition

Keywords: brownies, dessert, chocolate, Guinness, frosting, St. Patrick's Day