The frosting recipe is another story! I don't know what I did wrong, I completely ruined the frosting! As the frosting was cooking over the heat the melted butter seperated from the chocolate mixture. I continued to let it simmer for the five minutes hoping it would all come together but it just didn't happen. I don't know if I over mixed while cooking or if substituting the evaporated milk/half-and-half for light milk made the difference. I was too frustrated and tired to attempt another batch. I ended up just making a basic thin chocolate icing instead.
Hopefully I have better luck next time! Click here for the printable recipe.