Inspired by Irish flavors, this shouldn’t be reserved for just one day a year. Rich and incredibly moist, these Guinness-infused dark chocolate cupcakes are finished with a silky Irish cream cream cheese frosting.
This scratch-made cupcake recipe takes its cue from classic chocolate cakes and elevates them with Guinness stout and buttermilk for deep, complex flavor and exceptional moistness. The combination of stout and buttermilk results in a tender crumb and a chocolate intensity that keeps these cupcakes from ever feeling dry or heavy. The frosting—cream cheese whipped with a splash of Irish cream liqueur—adds a creamy, slightly boozy finish that balances the dark chocolate perfectly.
I love recipes that are easy to make yet impressive to share. With simple steps and everyday ingredients, these cupcakes come together quickly and deliver bakery-quality results at home. They’re ideal for St. Patrick’s Day celebrations, brunch gatherings, or any time you want a comforting chocolate treat with a grown-up twist.
The method is straightforward:
- Combine dry ingredients in a large bowl.
- Whisk in Guinness, buttermilk, eggs, and oil.
- Beat the mixture briefly, then divide into muffin tins and bake.
- Once cooled, spread or pipe the Irish cream cream cheese frosting.
The frosting requires only a few ingredients and a short beat to become light and fluffy. For a firmer consistency suitable for piping detailed decorations, add extra powdered sugar a little at a time until you reach the desired texture.
How to make Guinness Dark Chocolate Cupcakes with Irish Cream Cream Cheese Frosting
Start by whisking together all dry ingredients: flour, granulated sugar, unsweetened cocoa powder, baking powder, baking soda, and salt. This ensures even distribution and a consistent rise.
Stir in the wet ingredients next: Guinness stout, buttermilk, eggs, vegetable oil, and vanilla extract. The batter will be quite thin—that’s expected and produces a tender cupcake when baked.
Beat the batter at medium-high speed for about two minutes to develop structure and incorporate air. Portion the batter into paper-lined muffin tins using a 4-ounce ice cream scoop or a 1/4-cup measure to achieve uniform cupcakes, and bake until a toothpick inserted in the center comes out clean.
While the cupcakes cool, prepare the frosting. Beat room-temperature cream cheese and butter until light and fluffy, then add Irish cream liqueur and powdered sugar and blend until smooth. Adjust powdered sugar to firm the frosting if you plan to pipe decorative swirls or rosettes.
Can I use this recipe for a full-size cake?
Yes. This batter adapts well to several pan sizes. Bake in a 9×13-inch pan, two 9-inch round pans, or a 12-cup bundt or tube pan. Baking times will vary by pan: expect roughly 35–40 minutes for a 9×13, 28–35 minutes for two 9-inch rounds, and about 50–55 minutes for a detailed bundt or tube pan (use a less intricate pan for easier release).
These have become a favorite in my kitchen, and I plan to make them year-round. The bold chocolate and subtle Irish cream notes make them memorable without being overpowering. If you try them, note how the stout deepens the chocolate flavor and how the frosting adds a soft, tangy-sweet finish.
If you enjoy baking with Irish flavors, consider pairing these cupcakes with other favorites like Irish cream desserts or savory dishes that feature stout. Comments and feedback on your results are always welcome—sharing photos and variations helps others recreate these treats with confidence.
Guinness Dark Chocolate Cupcakes with Irish Cream Cream Cheese Frosting
Ingredients
Guinness Cake
- 1 3/4 cup all-purpose flour
- 2 cups granulated sugar
- 3/4 cup unsweetened cocoa powder
- 2 teaspoons baking soda
- 1 teaspoon baking powder
- 1 teaspoon kosher salt
- 1 cup Guinness stout
- 1 cup buttermilk
- 2 eggs
- 1/2 cup vegetable oil
- 1 teaspoon vanilla extract
Irish Cream Frosting
- 16 ounces cream cheese, room temperature
- 1/4 cup butter, room temperature
- 2 cups powdered sugar
- 1/2 cup Irish cream liqueur (such as Baileys)
Instructions
- Preheat the oven to 350°F (175°C).
- Whisk together the flour, sugar, cocoa powder, baking soda, baking powder, and salt in a large mixing bowl.
- Add the Guinness, buttermilk, eggs, vegetable oil, and vanilla to the dry ingredients. Stir to combine.
- Beat at medium-high speed for two minutes. The batter will be thin—this is normal.
- Use a 4-ounce ice cream scoop or a 1/4-cup measure to fill paper-lined muffin tins about two-thirds full.
- Bake for 18–22 minutes, or until a toothpick inserted into the center comes out clean.
- Cool completely on a wire rack before frosting.
Irish Cream Cream Cheese Frosting
- Beat room-temperature cream cheese and butter until light and fluffy.
- Add Irish cream liqueur and powdered sugar and beat until the frosting is smooth and spreadable. Add up to 1/2–1 cup additional powdered sugar if a stiffer consistency is desired for piping.
- Frost cooled cupcakes and serve.
Notes
To bake as a 9×13-inch cake, pour batter into the prepared pan and bake for 35–40 minutes. For two 9-inch round cakes, bake 28–35 minutes. For a 12-cup bundt or tube pan, bake 50–55 minutes; choose a pan with a simpler design for easier release.