The day of the party, make the Dark Chocolate Guinness Cake with Bailey’s Icing. Start with the cake. You do not want to serve it hot as it will melt the icing. This makes it a good choice for baking earlier in the day. One note on the recipe. It says to butter and line the springform pan (also known as a cheesecake pan), but the recipe doesn’t say what to line it with. I checked other similar recipes and they did not suggest lining the pan. I buttered it, but didn’t line it. It worked fine. I suggest making the cake in the morning and the frosting later, early afternoon. Once frosted, I put the cake in the refrigerator so the frosting sets up. As the recipe indicates, the frosting should look like the froth on a glass of Guinness. So, just spread it over the top. Bring it back to room temperature before serving.