Divide the sponge cake in three parts. (use a long sharp knife, such as a fillet knife).
Take the first bottom of the sponge cake and put on the cake stand (cut wide strips of parchment paper and lay them around, they can then be removed when the cake is completely finished.)
Spread a layer of vanilla cream over the bottom layer of cake, divide the raspberries on top of the vanilla cream. Put on the middle bit of the cake on top of this.
Add vanilla cream and mold it to a little hill in the middle. Lay the top layer but turn it upside down so that you have the cut side up.
Add a big dollop of cream and shape this into a soft hill in the middle.
Then cover all visible portions of the cake with cream.
Press the marzipan into a round marzipan lid, big enough to cover the cake. Save some of the marzipan to form small leaves for the rose (or use what you cut away from the edges of the cake when shape it).
Put the lid on top of the cake, shape it around the sides, using your hands so that there are no folds.
Cut of left over marzipan at the bottom of the edge. Dust the cake with icing sugar.
Make a small rose of the pink marzipan and use some of the left over green marzipan to create small leaves to decorate your Princess cake.