"The cake layers are adapted from Hershey's Black Magic Cake. It is a great base chocolate cake. For the butterscotch, you can control the thickness by how long you boil it. If you find it is too runny after it cools, simmer for another minute or so. The time factor in the recipe works perfect on our cooktop, but everyone's heat will vary. We used bourbon in this sauce, but you could always us the traditional scotch of just leave it out completely and reduce cook time by a minute...."