Ingredients
Scale
- one (11.2–12-ounce (330–355ml) bottle guinness draught stout beer
- 3/4 cup (12 tbsp; 170g) unsalted butter
- two 4-ounce bars (226g) semi-sweet chocolate, coarsely chopped*
- 1 and 1/4 cups (250g) granulated sugar
- 3 large eggs, at room temperature
- 1 teaspoon pure vanilla extract
- 1 cup (125g) all-purpose flour (spooned & leveled)
- 1/2 teaspoon salt
- optional: 1/2 teaspoon espresso powder
- 1/2 cup (8 tbsp; 113g) unsalted butter, softened to room temperature
- 2 cups (240g) confectioners’ sugar
- 2–3 tablespoons reduced guinness (from step 1)
- 1 teaspoon espresso powder
- 1/2 teaspoon pure vanilla extract
- 1/4 teaspoon salt
Instructions
- Bring the Guinness to a boil in a small saucepan. Reduce heat and simmer until reduced to 2/3 cup, around 12–15 minutes. Let cool for 10 minutes.
- Preheat oven to 350°F (177°C) and prepare a 9-inch square baking pan with grease or parchment paper.
- Melt the butter and chopped chocolate in a large bowl, stirring until smooth. Mix in sugar and 1/2 cup reduced Guinness until combined. Add eggs and vanilla extract, then incorporate flour, salt, and optional espresso powder. Spread batter in prepared pan.
- Bake for 32 minutes, checking doneness with a toothpick every 2 minutes until a few moist crumbs remain.
- Let brownies cool in the pan on a rack before frosting.
- In a bowl, beat butter until creamy. Gradually add confectioners’ sugar, then stir in 2 tablespoons of reduced Guinness, espresso powder, vanilla extract, and salt. Adjust consistency with more Guinness or a splash of milk if needed.
- Once cooled, frost the brownies and cut them into squares.
- Store leftovers at room temperature for up to a week.
Last Step:
Please leave a rating and comment letting us know how you liked this recipe! This helps our business to thrive and continue providing free, high-quality recipes for you.Notes
Ensure to let the beer reduce properly for maximum flavor in the brownies.
Using room temperature eggs helps in achieving a smoother batter.
- Prep Time: 45 minutes
- Cook Time: 180 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 brownie
- Calories: 300
- Sugar: 30g
- Sodium: 150mg
- Fat: 15g
- Saturated Fat: 9g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 2g
- Protein: 4g
- Cholesterol: 80mg