Add a bit of pizazz to your cake. Make a gelatin dessert and build your cake around it.

Another way to do it is to make a bundt cake and insert a gelatin dessert into it.  

To make it blend into the cake nicely, pour a little bit
of warm gelatin into the hole and on top of the flower.

If your cake is dry, seal the edges of the hole with a little bit of gelatin and leave it in the fridge to set. This will prevent the cake from soaking up all the liquid gelatin from the hole.

Don't have a hole in your cake? Just place your dessert on the top!