St Patrick's Day Cupcakes with Guinness and Irish Whiskey

St. Paddy's Day is always fun. I love the prep time for the theme. Green beer (though I don't drink), cornbeef, cabbage soup, and pretty much any delicacies that look great with green food coloring are on the menu. Of course, sweets and treats are all around. For cupcakes, has a fantastic recipe for car bomb cupcakes. These pictures are from last year. More of the same will be made this year.

Guinness Chocolate Cupcake w/ Irish Whiskey Ganache Filling & Swiss Buttercream Frosting for St. Patrick's Day

St Patrick's Day Cupcakes with Guinness and Irish Whiskey
Makes 20 to 24 cupcakes

For the Guinness Chocolate Cupcakes
  • 1 cup stout (such as Guinness)
  • 1 cup (2 sticks) unsalted butter
  • 3/4 cup unsweetened cocoa powder (preferably Dutch-process)
  • 2 cups all purpose flour
  • 2 cups sugar
  • 1 1/2 teaspoons baking soda
  • 3/4 teaspoon salt
  • 2 large eggs
  • 2/3 cup sour cream
For the Ganache Filling
  • 8 ounces bittersweet chocolate
  • 2/3 cup heavy cream
  • 2 tablespoons butter, room temperature
  • 1 to 2 teaspoons Irish whiskey (optional)
Note: Swiss Buttercream with food coloring was used for frosting instead of the Baileys mix in the cupcake recipe.
For the Swiss Buttercream
  • 1 cup sugar
  • 4 large egg whites
  • 26 tablespoons unsalted butter, softened (3 sticks plus 2 tablespoons)
Make the cupcakes: Preheat oven to 350°F. Line 24 cupcake cups with liners. Bring 1 cup stout and 1 cup butter to simmer in heavy large saucepan over medium heat. Add cocoa powder and whisk until mixture is smooth. Cool slightly.

Whisk flour, sugar, baking soda, and 3/4 teaspoon salt in large bowl to blend. Using electric mixer, beat eggs and sour cream in another large bowl to blend. Add stout-chocolate mixture to egg mixture and beat just to combine. Add flour mixture and beat briefly on slow speed. Using rubber spatula, fold batter until completely combined. Divide batter among cupcake liners, filling them 2/3 to 3/4 of the way. Bake cake until tester inserted into center comes out clean, rotating them once front to back if your oven bakes unevenly, about 17 minutes. Cool cupcakes on a rack completely.

Make the filling: Chop the chocolate and transfer it to a heatproof bowl. Heat the cream until simmering and pour it over the chocolate. Let it sit for one minute and then stir until smooth. (If this has not sufficiently melted the chocolate, you can return it to a double-boiler to gently melt what remains. 20 seconds in the microwave, watching carefully, will also work.) Add the butter and whiskey (if you’re using it) and stir until combined.

Fill the cupcakes: Let the ganache cool until thick but still soft enough to be piped (the fridge will speed this along but you must stir it every 10 minutes). Meanwhile, using your 1-inch round cookie cutter or an apple corer, cut the centers out of the cooled cupcakes. You want to go most of the way down the cupcake but not cut through the bottom — aim for 2/3 of the way. A slim spoon or grapefruit knife will help you get the center out. Those are your “tasters”. Put the ganache into a piping bag with a wide tip and fill the holes in each cupcake to the top.


Make the frosting:
Whisk egg whites and sugar together in a big metal bowl over a pot of simmering water. Whisk occasionally until you can’t feel the sugar granules when you rub the mixture between your fingers.

Transfer mixture into the mixer and whip until it turns white and about doubles in size. (Here’s a tip: when you transfer to the mixer, make sure you wipe the condensation off the bottom of the bowl so that no water gets into the egg whites. This can keep them from whipping up properly.)

Add the vanilla.

Finally, add the butter a stick at a time and whip, whip, whip.


Don't forget to add green food coloring to stay with the theme. Spread on top of the cupcakes or use a piping tube and decorate. Sprinkle edible glitters for added decor.

Guinness Chocolate Cupcakes w/ Irish Whiskey Ganache Filling & Swiss Buttercream Frosting

There are many ways to decorate cupcakes for St. Patrick's Day. Here are some cupcakes made by someone else where the butter cream was made with browned butter and an edible shamrock charm. See here on how to brown the butter.

Guinness Chocolate Cupcake w/ Irish Whiskey & Browned Butter Swiss Buttercream