For the Malakoff chocolate cake, mix all the ingredients for the cake base together with a whisk until smooth.
Butter a springform pan well, pour in the mixture and bake in a preheated oven at 180 °C for about 10-12 minutes. Allow to cool.
For the vanilla cream, mix 3-4 tablespoons of cold milk with custard powder. Soak gelatine in cold water. Boil remaining milk with vanilla pulp, sugar and a pinch of salt, stir in custard mixture and stir until mixture is firm.
Remove from heat and stir in squeezed gelatin with a hand blender. Let cool to room temperature, then fold in semi-stiff whipped cream.
For the chocolate cream, soak gelatin, crush couverture and place in a bowl. Bring the milk to the boil and pour over the couverture. Blend in squeezed gelatin with a hand blender until mixture reaches an elastic consistency.
Let cool to body temperature, then fold in semi-stiff whipped cream. Place the cake base in the appropriate ring mold. To soak, mix lute sugar with rum and drizzle cake base with a little liquid.
Slightly heat the jam and spread on the base. Then first spread chocolate cream about 2 cm high, dip biscuits briefly in the soaking liquid and place on top.
Now spread vanilla cream about 2 cm high and cover again with soaked biscuits. Repeat process and finish with vanilla cream.
Smooth and spread at least 3