Beat the margarine with the sugar and vanilla sugar until creamy. Gradually stir in the eggs. Peel the bananas and mash them with a fork and stir into the butter egg mixture with the rum flavor. Mix the almonds, flour, desiccated coconut and baking powder and stir into the banana mixture.
Grease a springform pan and dust with flour. Pour in the dough and smooth it out. Bake in a preheated oven at 170 ° C (convection) for about 25-30 minutes (stick test). Remove the cake from the mold after 10 minutes. Let cool down.
For the frosting, stir together the melted chocolate and cream cheese. Stir in the butter and powdered sugar. Brush the cake with it and sprinkle with desiccated coconut. Chill for 2 hours.