Description
These Guinness Chocolate Brownies are a rich, fudgy treat infused with the deep, malty flavor of Guinness stout. Topped with a luscious Baileys-infused Swiss meringue buttercream frosting, these brownies combine chocolatey indulgence with a smooth boozy twist, perfect for celebrating St. Patrick’s Day or any special occasion.
Ingredients
Scale
Brownie Ingredients
- 3oz (1/4 Cup + 2 Tablespoons) Guinness, reduced from 6oz (3/4 Cup)
- 1oz (2 Tablespoons) Unsalted Butter
- 250 Grams (1 1/4 cups) Granulated Sugar
- 90 Grams (3/4 cups) Dutch-process Cocoa Powder
- 3.5oz (scant 1/2 cup) Vegetable Oil
- 2 Teaspoons Pure Vanilla Extract
- 1 Large Egg Yolk, at room temperature
- 1 Large Egg, at room temperature
- 1/8 Teaspoon Baking Soda
- 1/2 Teaspoon Salt
- 1 Tablespoon Cornstarch (Cornflour)
- 75 Grams (scant 2/3 cup) All-Purpose Flour (Plain Flour)
- 2oz (1/4 cup) Chocolate chips, chunks, or bars chopped
Frosting
- 1/2 Recipe of Baileys Swiss Meringue Buttercream
Instructions
- Reduce Guinness: In a large pot, add the full 6oz of Guinness and simmer over medium heat for 5-10 minutes until reduced by 50%, leaving 3oz of concentrated Guinness flavor.
- Mix Butter and Sugar: Add the unsalted butter and granulated sugar to the reduced Guinness. Cook on low heat until the butter melts and the sugar fully incorporates, which helps create a chewy brownie texture with a crinkly top. Let cool for 5 minutes, then transfer the mixture to a separate bowl.
- Add Cocoa and Oil: Stir in the Dutch-process cocoa powder and vegetable oil to the cooled Guinness mixture until fully combined and smooth.
- Combine Wet Ingredients: Add the vanilla extract, large egg, and large egg yolk to the cocoa mixture, whisking thoroughly to combine.
- Add Dry Ingredients: Mix in baking soda, salt, and cornstarch. Gently fold in the all-purpose flour using a spatula, stirring just until no flour streaks remain to avoid overmixing which can toughen the brownies.
- Incorporate Chocolate: Fold in the chopped chocolate chunks or chips gently without overmixing.
- Bake the Brownies: Pour the batter into a 9-inch square pan lined with foil and greased heavily with non-stick spray. Bake in a preheated 350°F (180°C) oven for 25-27 minutes until a toothpick inserted comes out with moist crumbs but no liquid batter.
- Cool and Frost: Allow brownies to cool completely. Using an offset spatula, pipe or spread swirls of Baileys Swiss Meringue Buttercream on top.
- Serve and Store: Cut brownies into 9 to 16 pieces depending on desired serving size. Store at room temperature unless in a warm environment, then refrigerate to maintain texture.
Notes
- These brownies are rich, chocolatey, and infused with Guinness stout for a unique malt flavor complemented by a creamy Baileys frosting.
- Best enjoyed at room temperature for optimal texture and flavor balance.
- Using Dutch-process cocoa powder gives a deeper, smoother chocolate flavor compared to natural cocoa.
- Reducing the Guinness intensifies its flavor without adding excess liquid to the batter.
- Overmixing the batter after adding flour can result in tougher brownies, so fold gently until just combined.
- The frosting is Baileys Swiss Meringue Buttercream, adding a boozy, creamy richness that pairs perfectly.
- Store brownies in an airtight container; if refrigerating, allow them to come back to room temperature before serving for best texture.
Nutrition
- Serving Size: 1 brownie (assuming 16 pieces)
- Calories: 280 kcal
- Sugar: 25 g
- Sodium: 120 mg
- Fat: 15 g
- Saturated Fat: 6 g
- Unsaturated Fat: 8 g
- Trans Fat: 0 g
- Carbohydrates: 35 g
- Fiber: 3 g
- Protein: 3 g
- Cholesterol: 45 mg
