Triple Layer Guiness Cake (Chocolate Stout Cake) with Bailey's Frosting and Whiskey Ganache

Every St. Patrick's Day, I break out a Guinness recipe. Mostly this is because I'm a dark chocolate person, and Guinness, much like coffee, makes good chocolate take on a darker, slightly more bitter and complex taste. Add to that a sense of satisfaction at boozy cakes, and car bomb cake is just a hop, skip, and a jump away. In the past I've made Car Bomb Cupcakes, but this year I went for the full-on cake, decorated to look like the top of an iconic pint glass. I also did not use Guinness this year, but opted instead for Duck Rabbit Milk Stout. The world of fantastic stouts is too great too always use Guinness, especially with the crazy St. Patrick's day mark up.

I have to admit that I had grand plans to take detailed photos of the stacking and icing of the cake, which I immediately forgot in the moment of icing. These pictures are from day three of this cake's life, after it had been hidden under foil overnight, and thus does not do the cake justice. This is a bummer. But trust me, the icing is not so hard as it seems, as you only need to rough ice this cake. You are making both the chocolate ganache and the Bailey's buttercream, but they use different methods. You don't have to cream the butter for the ganache, and the amounts come out perfectly to ice the center layers and sides in the chocolate ganache and use all of the buttercream for the top of the cake. 

This recipe makes three layers in 8" cake pans, or 2 layers in 9" cake pans. If you are like me and get very anxious about evenly weighing your cake pans/ do not have three cake pans so need to make them in waves, I have found that 2 lbs. for each layer should be about right (1 lbs 15 3/4 oz if you are using large instead of extra large eggs) for an 8" cake. Make sure, if you are making the 9" pan, that your cake pan is at least 2" deep. If you only want to use a single can of Guinness (weighing in a 14.9 oz), you can top off the cake with water or cold coffee (as a substitute for the espresso powder). Or you can enjoy the rest of that smooth 2nd Duck Rabbit milk stout during the cooking of the cake.

Chocolate Milk Stout Cake (Guinness Cake)

Ingredients

Stout Cake
2 cups stout or dark beer, such as Guinness
2 cups (4 sticks) unsalted butter
1 1/2 cups Dutch-process cocoa
4 cups All purpose flour
4 cups sugar
1 tablespoon baking powder
1 1/2 teaspoons salt
1/2 teaspoon espresso powder
1/2 teaspoon vanilla
4 extra large eggs
8 oz sour cream


Chocolate Whiskey Ganache
1 pound bittersweet or semisweet chocolate, chopped
2 cups heavy cream
1 teaspoon vanilla extract
2 -4 tablespoons whiskey (to taste)
1 teaspoon espresso powder

Bailey's Irish Cream Buttercream Frosting
 3 to 4 cups confections sugar

1 stick (1/2 cup or 4 ounces) unsalted butter, at room temperatue 

1/4 cup Baileys - 1 airplane bottle's worth, plus more to taste

Additional milk or cream for blending if necessary.

Instructions:

1. Preheat the oven to 350°F. 
2. Cut three round parchment paper circles that fit neatly in the bottom of 3 8" cake pans or 2 9" cake pans.
3. Grease and flour three 8" or two 9" cake pans, and line them with the parchment paper circles.
4. For the cake: Place the stout, espresso powder and butter in a large, heavy saucepan, and heat until the butter melts.
5. Remove the pan from the heat, and add the cocoa powder.
6. Whisk until the mixture is smooth and shiny. Set aside to cool to room temperature.
7. Whisk together the flour, sugar, baking powder, and salt in a large bowl; set aside.
8. In a large mixing bowl or the bowl of a standing mixer, beat together the eggs, vanilla and sour cream on medium for about a minute.
9. Add the stout-cocoa mixture, mixing to combine.Use a batter guard if you have one.
10. Add the flour mixture a little bit at a time and mix together at slow speed. Scrape the sides and bottom of the bowl, and mix again for 1 minute. 
11.  Divide the batter equally among the prepared pans. (See above for weighing hints.) Drop the pan a couple times against the top of the counter to even out batter and let any air bubbles escape prior to baking.
12. Bake the layers for 35-38 minutes for 8" pans, or 45 to 50 minutes for 9" pans, until a cake tester inserted into the center comes out clean. 
13. Remove the cakes from the oven and cool on a rack for 10 minutes before turning the cakes out of their pans and returning to the rack to finish cooling completely before frosting. If you are reusing a cake pan, wait an additional 10 minutes for the empty pan to cool before rinsing and re-greasing. 
14. For the whiskey ganache: Place the chopped chocolate in a large heatproof bowl along with the espresso powder if using.
15. Bring the cream to a simmer in a heavy, medium-sized saucepan, stirring frequently and watching to make sure not to scald the cream.
16. Pour the hot cream over the chocolate and stir until the mixture is completely smooth and melted. The mixture will start out looking almost a little separated before chocolate melts and blends. 
17. Stir in the whiskey and vanilla. Refrigerate until the icing is spreadable, stirring occasionally, about an hour and a half. If you do not stir the edges will get overly stiff and have to be reincorporated during assembly.
18.  For the Bailey's Irish Buttercream: Whip the butter in the bowl of an electric mixer, or with a hand mixer, for several minutes. You want to get it very light and fluffy. Slowly add the powdered sugar, a few tablespoons at a time.
19. When the frosting looks thick enough to spread or thicker, drizzle in the Baileys (or cream if you are doing the non-alcoholic option) and whip it until combined and frosting is correct texture. 
20. If this has made the frosting too thin (it shouldn’t, but just in case) beat in another spoonful or two of powdered sugar. Adjust for taste and desired degree of alcohol.
21. To assemble: If all of your cakes are rather domed, trim one cake layer to have a flat top, if necessary.
22. Place the layer upside down on a serving plate or cake stand. Spread 1/3 of the chocolate whiskey icing over just the top of the layer, starting with a large mound of icing in the middle of the cake, and moving your spreader around in a circular motion to spread icing all the way to the edges of the layer. Don't worry if it spills over the edges of the cake a little, you'll get to fix that later.
23. Top with another cake layer, top side down, and repeat the process. If you baked three layers, add that one also.
24. Use the remaining frosting to cover the sides of the cake. You can gently press the layers closer together if the stacking feels a little iffy, but be very careful to keep the cake straight. To clean up your mess on the edge of the serving plate, using a paper towel dipped in water to carefully remove any chocolate.
25. Top the top layer of the cake with a generous layer of the Bailey's buttercream frosting, making sure that the edge of the Bailey's covers the top of the edge of whiskey ganache. 
26. Store in fridge until ready to serve. Remember that the top layer of buttercream will not stiffen as much as the ganache will.