Why You’ll Love This Recipe

• Incredibly moist and tender crumb that stays fresh for days.
• Deep, rich chocolate flavor with notes of coffee and malt.
• Surprisingly easy one-bowl cake batter for quick prep.
• Elegant enough for a celebration but simple enough for a weekend treat.

Equipment You’ll Need

• 9-inch round cake pan
• Medium saucepan
• Large mixing bowl
• Whisk
• Silicone spatula
• Measuring cups and spoons
• Stand mixer or electric hand mixer
• Parchment paper

Ingredients

• For the Chocolate Guinness Cake:
• 1 cup Guinness stout (or other dark stout beer)
• 1/2 cup (1 stick) unsalted butter, cut into pieces
• 3/4 cup unsweetened Dutch-process cocoa powder
• 2 cups all-purpose flour
• 2 cups granulated sugar
• 1 1/2 teaspoons baking soda
• 3/4 teaspoon salt
• 2 large eggs, at room temperature
• 3/4 cup sour cream, at room temperature
• 1 teaspoon vanilla extract
• For the Whipped Irish Cream Frosting:
• 8 ounces cream cheese, softened to room temperature
• 1/2 cup (1 stick) unsalted butter, softened to room temperature
• 4 cups powdered sugar, sifted
• 1/4 cup Irish cream liqueur (like Baileys)
• 1 teaspoon vanilla extract
• Pinch of salt

Instructions

1. Preheat and Prep: Preheat your oven to 350°F (175°C). Grease a 9-inch round cake pan and line the bottom with a circle of parchment paper. Grease the parchment paper as well.
2. Melt Butter and Beer: In a medium saucepan over medium heat, combine the Guinness and the butter pieces. Heat, stirring occasionally, until the butter is completely melted. Remove from heat.
3. Add Cocoa: Whisk the unsweetened cocoa powder into the warm beer and butter mixture until it’s smooth and there are no lumps. Set aside to cool for about 10 minutes.
4. Combine Dry Ingredients: In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking soda, and salt. Create a well in the center.
5. Combine Wet Ingredients: In a separate medium bowl, whisk together the room temperature eggs, sour cream, and vanilla extract until well combined.
6. Mix the Batter: Pour the cooled chocolate-beer mixture into the dry ingredients, followed by the egg and sour cream mixture. Whisk everything together until just combined. Be careful not to overmix; a few small lumps are okay. The batter will be quite thin.
7. Bake the Cake: Pour the batter into your prepared cake pan and smooth the top with a spatula. Bake for 35-40 minutes, or until a wooden skewer or toothpick inserted into the center of the cake comes out with a few moist crumbs attached, but no wet batter.
8. Cool the Cake: Let the cake cool in the pan on a wire rack for 15-20 minutes. Then, carefully run a knife around the edge of the pan and invert the cake onto the wire rack. Peel off the parchment paper and let it cool completely to room temperature before frosting.
9. Make the Frosting: While the cake cools, prepare the frosting. In the bowl of a stand mixer fitted with the paddle attachment (or using a hand mixer and a large bowl), beat the softened cream cheese and butter on medium-high speed until light, creamy, and smooth, about 2-3 minutes.
10. Finish the Frosting: Reduce the mixer speed to low and gradually add the sifted powdered sugar, one cup at a time, until it’s all incorporated. Add the Irish cream liqueur, vanilla extract, and a pinch of salt. Increase the speed to medium-high and beat for another 2-3 minutes until the frosting is incredibly light and fluffy.
11. Frost and Serve: Once the cake is completely cool, place it on a serving plate or cake stand. Spread the whipped Irish cream frosting generously over the top of the cake, creating beautiful swirls with an offset spatula or the back of a spoon. Slice and serve immediately.

Expert Cooking Tips

• Room Temperature is Key: For the smoothest cake batter and creamiest frosting, make sure your eggs, sour cream, butter, and cream cheese are all at room temperature before you begin.
• Don’t Overmix the Batter: Mix the wet and dry ingredients only until they are just combined. Overmixing develops the gluten in the flour, which can result in a tough, dense cake instead of a tender one.
• Sift for Smoothness: Always sift your cocoa powder and powdered sugar. This simple step prevents lumps and ensures your cake and frosting have a silky-smooth texture.
• Cool Completely: This is the golden rule of cake frosting! If you try to frost a warm cake, the frosting will melt into a greasy puddle. Patience is a virtue here.

Substitutions and Variations

Don’t have Guinness? Any dark stout or porter will work well. For a non-alcoholic version, you can substitute the beer with an equal amount of strong brewed coffee or a non-alcoholic stout. Full-fat Greek yogurt can be used as a 1:1 substitute for sour cream. If you’re not a fan of Irish cream, you can substitute it in the frosting with heavy cream or milk for a delicious cream cheese frosting, or omit the cream cheese for a classic vanilla buttercream.

Common Mistakes to Avoid

A common mistake is not letting the butter and beer mixture cool down enough before adding it to the other ingredients, which can scramble the eggs. Ensure it’s just warm to the touch. Another pitfall is overbaking; this cake is meant to be very moist, so pull it from the oven as soon as a toothpick comes out with moist crumbs, not perfectly clean. Finally, don’t use cold cream cheese or butter for the frosting—it will be lumpy and impossible to get smooth.

Serving Suggestions

This cake is a star all on its own, but for an extra touch of elegance, garnish with dark chocolate shavings or a light dusting of cocoa powder. It pairs beautifully with a scoop of vanilla bean ice cream or a dollop of unsweetened whipped cream to cut through the richness. For the ultimate indulgence, serve a slice with a hot cup of coffee or a small glass of Irish cream on the side.

Storage and Reheating Tips

Store the frosted cake in an airtight container in the refrigerator for up to 4 days. For the best flavor and texture, allow slices to sit at room temperature for about 20-30 minutes before serving. You can also freeze the unfrosted cake layer. Wrap it tightly in two layers of plastic wrap and one layer of aluminum foil and freeze for up to 3 months. Thaw overnight in the refrigerator before frosting.

Frequently Asked Questions

Will this cake actually taste like beer?

Not at all! You won’t taste a distinct ‘beer’ flavor. The Guinness stout works its magic by enhancing and deepening the chocolate flavor, adding wonderful malty, caramel, and coffee-like notes. The alcohol bakes out completely, leaving only a rich, complex deliciousness behind.

Can I make this recipe as cupcakes?

Absolutely! This batter is perfect for cupcakes. Line a standard 12-cup muffin tin with paper liners and fill each about two-thirds full. Bake at 350°F (175°C) for 18-22 minutes, or until a toothpick inserted into the center comes out clean. This recipe should yield about 18-24 cupcakes.

My batter looks very thin, is that normal?

Yes, it’s perfectly normal! This is a very liquidy cake batter, which is what helps create its signature super-moist and tender crumb. Don’t be tempted to add more flour; trust the process and you’ll be rewarded with a fantastic cake.

Can I prepare this cake in advance?

Definitely! This is a great make-ahead dessert. You can bake the cake layer, let it cool completely, then wrap it tightly in plastic wrap and store it at room temperature for up to two days. The frosting can also be made ahead and stored in an airtight container in the fridge for up to a week. Just let it soften on the counter and re-whip it for a few minutes before frosting the cake.

Conclusion

There you have it—a rich, fudgy, and incredibly impressive Chocolate Guinness Cake that is sure to become a new favorite. The deep chocolate flavor and luscious frosting are a match made in dessert heaven. I can’t wait for you to try this recipe and hear how much you love it! If you make it, please snap a photo and share it on Pinterest or Instagram, and don’t forget to tag me!