My son is allergic to chocolate and so I have perfected a carob cake that tastes just like a German Chocolate Cake. and I must say this is the best tasting GCC that I have EVER tasted! Every time I bake this it is gone within a day and the kids are asking for more.
For faster decoration and preparation time, you can leave out the ganache and just use the filling for the "icing". I tend to do this a lot to save time. Just remember to have a thin layer running down the sides or the icing with collapse/fall to the bottom from all the nut weight.