Black-forest cake in a bowl

I was in the mood for something with whipped cream today, originally I wanted to make a cake that can be cut into pieces but in the end we decided to just throw every ingredient into a big bowl and see how it turns out. It's completely sugar free, the sponge cake was made with xylitol and the custard has sweetener in it. This huge bowl was almost half empty when I started to give "samples" to everyone so I guess it was a successful try...:) This dessert can be improved yet, maybe next time I should put the layers into a flat dish, what do you guys think? 

Ingredients:

• 10 dkgs of plain flour
• 6 eggs
• 10 dkgs of xylitol
• 10 dkg of grated almonds 
• 1 teaspoon of rum flavour
• 2 tbl spoons of cocoa powder
• 10 dkgs of butter
• 1 packet of vanilla custard powder
• 1 packet of chocolate custard powder
• 1 l of milk
• a big can of sour cherries or 30 dkgs of fresh or frozen sour cherries (without the seeds)
• 4 dls of sour cherry juice
• 2.5 tablespoons of gelatine
• half a litre of whipped cream

Separate the eggs and beat the whites up with the xylitol until it becomes white and hard. Whisk the soft butter and the egg yolks together and add the mixture to the whites. Carefully mix them together. Then mix the flour with the cocoa powder and sift it into the bowl, add the grated almonds, give it a good stir until it becomes a solid dough. Lay some baking paper into a roasting pan and pour the mixture in it. Bake it at 180 deg Celsius until nothing sticks to the needle that you stick into it, then take it out and cut it into pieces so that it cools down quickly. 

Meanwhile in half a litre of milk cook the vanilla custard and int he other half the chocolate custard. Add the gelatine to the cherry juice and bring it to a boil, then take it off the heat and let it cool down a bit. Lay some sponge cake on the bottom of the bowl and then add the other layers of custard, sour cherries, the cherry jelly and other layers of sponge cake. When it's done, top it up with the whipped cream and put it in the fridge for a couple of hours.