I designed a cake this weekend with simple, yet elegant decorations done with dark chocolate (to look like black). I didn't know how it would hold up on the whipped cream icing, but it did just fine. It is always a trial to set up a cake iced in whipped cream, as the whipped cream tends to be very unforgiving. The icing goes on very smooth and looks wonderful, but if any repair work is needed after the cake has set for awhile, it is very hard to make it look good, and it is almost certain that some touch up work will be needed somewhere. That's when flowers, etc. come in nicely. . . or you can also make certain the touched up part is at least not in the front of the cake. The flavor of this cake was dark chocolate mint with chocolate mint mousse filling.