In reality, the thing that takes the longest is the Caramel Buttercream, which in the recipe says to make 3 hours ahead of time but it took me 5 hours from start to finish. No frosting should take 5 hours to make! But then again, it is a very good frosting. It is light and silky in texture with a deep caramel flavor. It is neither too rich nor too sweet. I might make it again someday when I forget how long 5 hours can be. It was really very delicious.
The cake itself requires lots of little bowls of pre-prepped ingredients but once assembled, mixing is pretty quick.
I expected a dark, chocolatey cake since it has melted 99% chocolate and coffee and cocoa powder, but the resulting cake is light in color. Similar to a german chocolate cake, which incidentally, Rose uses a dark chocolate cake for. The cake is very velvety, tender and light with a satisfying chocolate flavor. This is a cake to make again and again!