If you like peanut butter fudge, I think you will like this cake. The icing reminds me of peanut butter fudge. However, the peanut butter flavor is more subtle than in the peanut butter fudge I make.
Although there is some stove top cooking involved, this is a very quick baking cake that can be placed in a half sheet baking pan to serve a crowd. If you do use a half sheet baking pan, I recommend doubling the icing recipe as it takes more than one batch to adequately cover the entire cake.