This cake is the basis for many of the goodies found in a German Konditori.
(This is a wonderful place filled with cakes and pastries of many kinds, a coffee shop if you will). For a quick fix split the cake into 2 or 3 layers, mix 1 tablespoon of instant coffee with 2 cups whipping cream, whip the cream and use to fill and ice the cake. (I like to sweeten the cream as well, but never had it sweetened when I was in Germany)
To split the cake, try this: with a knife make a shallow cut all around the cake, lay a thread in the cut, cross the ends and pull the thread in opposite directions.