If you’re searching for a show-stopping dessert that combines bold flavors, rich textures, and a touch of indulgence, this Guinness Chocolate Cake with Irish Buttercream is the ultimate choice. Infused with the deep, malty notes of Guinness stout and layered with velvety Irish buttercream, this cake is as luxurious as it is delicious. Whether you’re celebrating St. Patrick’s Day, hosting a special event, or simply craving a slice of chocolate heaven, this recipe delivers on every level. Let’s dive into everything you need to know to create this decadent masterpiece!
Why You’ll Love This Recipe
- Deep, Rich Flavor: The Guinness enhances the cocoa powder, creating an intense chocolate experience without tasting like beer.
- Moist & Decadent: The combination of sour cream and stout ensures a moist, fudgy texture that melts in your mouth.
- Velvety Irish Buttercream: Made with creamy Irish butter, this frosting adds a silky-smooth finish that complements the cake perfectly.
- Perfect for Celebrations: With its stunning layers and indulgent taste, this cake is ideal for holidays, birthdays, or any festive occasion.
- Customizable: From coffee-infused twists to alcohol-free versions, there are endless ways to adapt this recipe to suit your preferences.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
For the Guinness Chocolate Cake:
- Guinness Stout: Adds depth and richness to the chocolate flavor.
- Unsalted Butter: Provides a rich base for the cake batter.
- Unsweetened Cocoa Powder: Delivers intense chocolatey goodness.
- Granulated Sugar & Brown Sugar: Balances sweetness and adds moisture.
- Eggs & Vanilla Extract: Bind the ingredients and enhance flavor.
- Sour Cream: Ensures a tender crumb and keeps the cake moist.
- All-Purpose Flour: Forms the structure of the cake.
- Baking Soda & Baking Powder: Ensure the cake rises beautifully.
- Salt: Enhances all the flavors.
For the Irish Buttercream:
- Irish Butter (Softened): Offers a higher fat content for extra creaminess.
- Powdered Sugar: Creates a smooth, sweet frosting.
- Heavy Cream: Adds richness and helps achieve the perfect consistency.
- Vanilla Extract: Elevates the flavor profile.
- Irish Whiskey (Optional): Adds a subtle, boozy kick for those who enjoy it.
Step-by-Step Instructions
Make the Cake
- Preheat & Prep
Preheat your oven to 350°F (175°C). Grease and line two 9-inch round cake pans with parchment paper. For taller layers, use three 6-inch pans instead. - Heat the Guinness & Butter
In a saucepan over medium heat, combine the Guinness and unsalted butter. Heat until the butter melts completely. Remove from heat and whisk in the cocoa powder and sugars until smooth. Allow the mixture to cool slightly before proceeding. - Mix Wet Ingredients
In a large mixing bowl, whisk together the eggs, vanilla extract, and sour cream. Slowly pour in the cooled Guinness mixture, stirring until fully combined. - Combine Dry Ingredients
In a separate bowl, whisk together the all-purpose flour, baking soda, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, mixing just until combined. Be careful not to overmix, as this can make the cake dense. - Bake
Divide the batter evenly between the prepared cake pans. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Let the cakes cool in the pans for 10 minutes before transferring them to a wire rack to cool completely.
Make the Irish Buttercream
- Beat the Butter
In a large mixing bowl, beat the softened Irish butter until light and fluffy. This step ensures a smooth, airy frosting. - Add Sugar & Cream
Gradually add powdered sugar, alternating with heavy cream, and beat until the frosting is smooth and creamy. Adjust the amount of cream for your desired consistency. - Add Flavor
Mix in the vanilla extract and Irish whiskey (if using) for an extra layer of depth. Taste as you go and adjust the flavors to your preference.
Assemble the Cake
- Frost the Cake
Place one cake layer on a serving plate and spread a generous amount of buttercream on top. Add the second layer and repeat. Frost the top and sides of the cake, smoothing with an offset spatula. For a polished finish, chill the cake briefly before smoothing the frosting. - Serve & Enjoy
Slice and serve this decadent cake at room temperature for the best flavor and texture. Pair it with a cup of coffee or tea for an unforgettable treat.
Servings and Timing
- Servings: 12 slices
- Prep Time: 20 minutes
- Bake Time: 30-35 minutes
- Total Time: 1 hour
Variations
- Extra Chocolatey: Fold chocolate chips into the batter for added richness and texture.
- Coffee-Infused: Replace part of the Guinness with brewed espresso for a mocha twist.
- Boozy Frosting: Increase the amount of Irish whiskey in the buttercream for a stronger kick.
- Gluten-Free Option: Use a 1:1 gluten-free flour blend to make the cake celiac-friendly.
- Nutty Addition: Sprinkle chopped walnuts or pecans between the layers or on top for a crunchy contrast.
Storage and Reheating Tips
Storage
Store the assembled cake in an airtight container at room temperature for up to 2 days. For longer storage, refrigerate for up to 5 days.
Freezing
For extended shelf life, freeze the unfrosted cake layers for up to 3 months. Wrap each layer tightly in plastic wrap and aluminum foil, then thaw at room temperature before frosting.
Reheating
Let chilled cake come to room temperature before serving to restore its soft texture and rich flavor.
Frequently Asked Questions
Can I Use a Different Stout?
Yes! Any dark stout with a rich malt flavor works well. Experiment with different brands to find your favorite.
Does the Cake Taste Like Beer?
No, the Guinness enhances the chocolate flavor without making the cake taste like beer. The alcohol evaporates during baking, leaving behind only the malty notes.
Can I Make Cupcakes Instead?
Absolutely! Fill cupcake liners about ¾ full and bake at 350°F (175°C) for 18-20 minutes, or until a toothpick comes out clean.
What Makes Irish Butter Different?
Irish butter has a higher fat content than regular butter, giving it a creamier texture and richer flavor. It’s perfect for creating a luxurious buttercream.
Can I Make This Without Alcohol?
Yes! Replace the Guinness with strong brewed coffee and omit the whiskey in the buttercream for an alcohol-free version.
How Do I Make the Buttercream Stiffer?
Add more powdered sugar or chill the frosting in the refrigerator for 10-15 minutes before spreading.
Can I Add Nuts?
Yes! Chopped walnuts or pecans add a delightful crunch to the cake layers or as a garnish on top.
How Do I Get a Smooth Frosting Finish?
Use an offset spatula to smooth the frosting, and chill the cake briefly in the refrigerator before final touches.
Can I Use Dutch-Processed Cocoa?
Yes! Dutch-processed cocoa gives a deeper chocolate flavor but may require adjusting the baking soda for proper leavening.
How Do I Make a Layer Cake Taller?
Bake the cake in three 6-inch pans instead of two 9-inch pans for extra height and dramatic presentation.
Final Thoughts
This Guinness Chocolate Cake with Irish Buttercream is a celebration of bold flavors and luxurious textures. The deep, malty notes of Guinness paired with rich chocolate and creamy Irish buttercream create a dessert that’s both indulgent and unforgettable. Whether you’re baking for St. Patrick’s Day, a special occasion, or simply because you deserve a treat, this cake is sure to impress.
So grab your mixing bowls, preheat that oven, and get ready to savor every bite of this decadent masterpiece. With its moist crumb, velvety frosting, and customizable options, this cake is a true crowd-pleaser that will leave everyone asking for seconds!
Guinness Chocolate Cake with Irish Buttercream
Ingredients
- 1 cup Guinness stout
- 1 cup unsalted butter
- 3/4 cup unsweetened cocoa powder
- 2 cups granulated sugar
- 1 cup brown sugar (packed)
- 2 large eggs
- 2 teaspoons vanilla extract
- 1 cup sour cream
- 2 cups all-purpose flour
- 1 1/2 teaspoons baking soda
- 1/2 teaspoon baking powder
- 1/2 teaspoon salt
- 1 cup Irish butter (softened, for buttercream)
- 4 cups powdered sugar
- 1/2 cup heavy cream
- 1 teaspoon vanilla extract (for buttercream)
- 1 tablespoon Irish whiskey (optional, for buttercream)
Instructions
- Preheat the oven to 350°F (175°C). Grease and line two 9-inch round cake pans with parchment paper.
- In a saucepan over medium heat, combine Guinness and butter. Heat until the butter melts completely. Remove from heat and whisk in cocoa powder, granulated sugar, and brown sugar until smooth. Let cool slightly.
- In a large mixing bowl, whisk together eggs, vanilla extract, and sour cream. Slowly mix in the cooled Guinness mixture until fully combined.
- In another bowl, whisk together flour, baking soda, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, mixing just until combined.
- Divide the batter evenly between the prepared cake pans. Bake for 30-35 minutes, or until a toothpick inserted into the center comes out clean. Let cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.
- For the buttercream, beat softened Irish butter in a mixing bowl until light and fluffy. Gradually add powdered sugar, alternating with heavy cream, and beat until smooth. Mix in vanilla extract and Irish whiskey (if using) until fully incorporated.
- Assemble the cake by spreading a layer of buttercream on the first cake layer. Top with the second layer and frost the top and sides of the cake. Smooth with an offset spatula.
- Slice and serve this decadent cake at room temperature. Enjoy!