The Ultimate Guinness Chocolate Cake with Baileys Buttercream Frosting
Prepare to be amazed by this incredibly moist, fudgy, and rich Guinness chocolate cake! It’s everything you could ever want in a chocolate cake recipe. The addition of Baileys buttercream frosting elevates the cake to a whole new level of decadence, infusing it with an extra layer of Irish-inspired flavor that you won’t be able to resist.

If you’re searching for the perfect treat to celebrate St. Patrick’s Day, look no further! This Guinness chocolate cake is an absolute winner. It’s inspired by a beloved chocolate cake recipe, but this Guinness-infused version takes richness and fudginess to a whole new dimension. This cake is guaranteed to impress your friends and family.
The best part? The cake batter comes together effortlessly in just one bowl! There’s no need to reduce the beer – simply pour it directly into the mixing bowl. This means fewer dishes to wash and less time spent hovering over the stove. Enjoy more time savoring the delicious results and less time cleaning up!
To complement the rich chocolate flavor, this cake is topped with a Baileys Irish cream buttercream frosting instead of a classic buttercream. The creamy, smooth flavor of Baileys pairs exceptionally well with the chocolate cake, creating a harmonious balance without being overly sweet. It’s a truly delightful combination that will tantalize your taste buds.
While this cake is perfect for St. Patrick’s Day celebrations, don’t limit yourself to enjoying it only once a year! This Guinness Chocolate Cake with Baileys Buttercream Frosting is ideal for any holiday or occasion when you’re craving something intensely chocolatey and slightly boozy. Birthdays, anniversaries, or even a simple weekend treat – this cake is always a great choice.
Recipe Video

Ingredient Notes & Substitutions
Guinness Beer
Don’t worry about the beer overpowering the cake! Guinness doesn’t make the cake taste like alcohol; instead, it enhances the chocolate flavor and adds an extra layer of richness. You can use either extra stout or draught beer in the batter. For a non-alcoholic option, non-alcoholic Guinness works just as well!
Bailey’s Irish Cream
If you’re hesitant to buy a whole bottle of Baileys solely for the frosting, consider looking for smaller fridge packs. This recipe doesn’t require a large amount. Alternatively, you can substitute some of the Baileys with heavy cream for a milder flavor, or use entirely heavy cream if you prefer a frosting without any alcohol. Feel free to customize the frosting to your preference!


Essential Tips for Making the Best Guinness Cake & Baileys Frosting
Making a cake is a journey, and these tips will guide you to success! From pan preparation to frosting finesse, these tricks will ensure your Guinness Chocolate Cake is the best it can be.
- Line your cake pans with parchment paper. This is a game-changer! Parchment paper makes removing the cake layers from the pans a breeze, preventing sticking and ensuring a clean release. Consider using pre-cut parchment paper circles for convenience, or simply cut out your own parchment paper rounds.
- Master the art of measuring flour correctly. Accuracy is key when it comes to baking. It is recommended using the spoon and level method when measuring flour, rather than scooping it directly from the container. Scooping tends to pack the flour, resulting in too much flour and a dense, dry cake.
- Avoid overmixing the cake batter. Overmixing can lead to a sunken cake, which no one wants! To prevent this in one-bowl recipes like this one, sift the dry ingredients into the bowl first before adding the wet ingredients. This helps ensure even distribution and prevents overworking the gluten.
- Don’t skip the instant espresso (or coffee)! While optional, a teaspoon of instant espresso or coffee powder intensifies the chocolate flavor. The coffee deepens the richness without making the cake taste like coffee.
- Consider freezing the cake layers before frosting. This is particularly helpful for soft, moist cakes like this one. Freezing the cake layers for an hour or two will firm them up, making them much easier to handle and frost. No more crumbling or sliding!
- Ensure your butter is at the correct temperature for the frosting. The consistency of the butter significantly impacts the frosting’s texture. The butter should be at a cool room temperature, soft enough to make an indent when gently pressed with your finger but not so soft that it slides around or turns to mush.
- Mix the frosting on low speed. Patience is a virtue when it comes to frosting. Mixing on low speed prevents powdered sugar from flying everywhere and minimizes air bubbles in your frosting, resulting in a smooth, velvety texture.




Cake Decorating Ideas for your Guinness Chocolate Cake
When it comes to decorating, the possibilities are endless! Whether you prefer a simple, elegant look or something more elaborate, this cake is a blank canvas for your creativity. It is recommended to use a crumb coat before applying the final layer of frosting for a clean, professional finish. Pipe the extra frosting around the top for an extra touch of beauty.
Consider adding a chocolate ganache drip or drizzling some salted caramel on top for added flavor and visual appeal. Chocolate shavings or Baileys truffles would also make beautiful additions. To make your own truffles, replace a few tablespoons of the heavy cream with Bailey’s Irish cream in this chocolate truffle recipe.
Alternatively, explore different frosting options! Chocolate buttercream, chocolate cream cheese frosting, or classic cream cheese frosting would also be incredibly delicious and complement the Guinness chocolate cake beautifully.
Tip: Check out this detailed post that walks you through how to decorate a cake for additional guidance and inspiration. Perfect if you’re new to cake decorating!

Adjusting the Size of Your Baking Pan
This recipe is designed for a two-layer 9-inch cake, but it’s easily adaptable to different pan sizes. Here’s how to adjust the baking time accordingly:
- 8-inch pans: Divide the batter evenly between three 8-inch round pans. The baking time should remain approximately the same. Keep a close eye on the cake to ensure even baking.
- 9×13-inch baking dish: Bake for 35 to 45 minutes, and reduce the frosting recipe by ⅓ to avoid having too much. Check for doneness by inserting a toothpick into the center; it should come out clean.
- Cupcakes: This recipe makes approximately 30 to 32 cupcakes. Bake for about 16 to 20 minutes, and fill the liners only ⅔ of the way full to prevent overflow.

Share your thoughts! If you try this Guinness Chocolate Cake recipe, don’t forget to leave a comment and star rating below to let me know what you think! As mentioned earlier, this cake is perfect for St. Patrick’s Day, but it’s also suitable for other holidays and celebrations because it’s truly exceptional.
Guinness Chocolate Cake Recipe with Baileys Buttercream
1
hour
30
minutes
1
hour
30
minutes
Pin Recipe