Stout and chocolate have long been natural partners in baking. The roasted barley in Guinness stout deepens the flavor of cocoa, creating a cake that tastes richer and more complex than a traditional chocolate cake.
This version includes several of my ‘secret’ chef techniques from my pastry chef days that make a noticeable difference. The stout is first reduced to concentrate its flavor. Dutch-process cocoa is “bloomed” in the warm stout and butter to intensify the chocolate notes. After baking, the cake is brushed with a light Guinness syrup that adds moisture and aroma. Finally, a whipped cream cheese frosting provides a light, tangy topping that resembles the creamy foam on a freshly poured pint.
The result is a moist, velvety chocolate cake that feels both rustic and indulgent.
INGREDIENTS:
For the Cake
1½ cups Guinness stout
10 tablespoons unsalted butter
¾ cup Dutch-process cocoa powder
1 cup granulated sugar
¾ cup packed dark brown sugar
¾ cup sour cream, room temperature
2 large eggs
2 teaspoons vanilla extract
2 cups all-purpose flour
1½ teaspoons baking soda
¾ teaspoon fine sea salt
1 teaspoon espresso powder (optional but recommended)
Guinness Syrup
½ cup Guinness stout
2 tablespoons granulated sugar
Whipped Cream Cheese Frosting
8 ounces cream cheese, room temperature
1¼ cups powdered sugar, sifted
½ teaspoon vanilla extract
¾ cup cold heavy cream
Optional garnish
Shaved bittersweet chocolate or cocoa nibs
METHOD:
Pour the Guinness stout into a small saucepan and bring to a gentle simmer. Cook until reduced to 1 cup, about 10 minutes. Set aside. This step concentrates the roasted malt flavor of the stout.
Preheat oven to 350°F. Butter a 9-inch springform pan and line the bottom with parchment paper.
In a saucepan over medium heat combine the reduced Guinness and the butter. Heat just until the butter melts. Whisk in the cocoa powder and espresso powder until smooth and glossy. This “blooms” the cocoa, intensifying its chocolate flavor.Whisk in the granulated sugar and dark brown sugar. Allow the mixture to cool slightly.
In a separate bowl whisk together sour cream, eggs, and vanilla extract. Whisk this mixture into the stout batter until smooth.
In another bowl whisk together flour, baking soda, salt. Fold the dry ingredients into the batter until fully incorporated. The batter will be thin.
Pour into the prepared pan.
Bake 45 to 55 minutes, until a toothpick inserted in the center comes out mostly clean with a few moist crumbs.
Allow the cake to cool in the pan for 15 minutes, then transfer to a rack and cool completely.
Make the Guinness Syrup
In a small saucepan combine Guinness and sugar. Simmer for about 5 minutes until slightly thickened.
While the cake is still slightly warm, brush the syrup evenly over the surface. This adds moisture and deepens the stout flavor.
Allow the cake to cool completely before frosting.
Prepare the Frosting
In a bowl beat together cream cheese, powdered sugar, and vanilla until smooth.
In a separate bowl whip the cold heavy cream until soft peaks form. Fold the whipped cream gently into the cream cheese mixture until light and fluffy.
Finishing the Cake
Spread the frosting over the top of the cake only, leaving the sides exposed. The topping should resemble the creamy foam on a pint of stout.
Garnish with shaved chocolate or cocoa nibs if desired.
BAKER’S TIPS:
Serving Sugestion
This cake is even better the next day, when the flavors deepen. Serve with fresh raspberries, lightly sweetened whipped cream, or a small glass of stout or espresso.
For a Slightly Richer Version
For an even richer version, fold ½ cup finely chopped dark chocolate into the batter before baking.
Use Butter and Oil for the Best Texture
Professional bakers often use a combination of butter and oil in chocolate cakes. Butter provides rich flavor, while a small amount of neutral vegetable oil keeps the crumb exceptionally moist and tender.
If you’d like to try this technique, replace 2 tablespoons of the butter with 2 tablespoons neutral vegetable oil (such as sunflower, avocado, or canola oil). The cake will stay softer for longer without sacrificing the buttery flavor.
Let the Batter Rest
After mixing the batter, allow it to rest for about 10 minutes before pouring it into the pan. This brief pause allows the flour to fully hydrate and the cocoa to absorb the liquid, resulting in a smoother batter and a more tender crumb.
Many professional bakers quietly rely on this step, particularly for chocolate cakes where cocoa powder benefits from extra hydration.
