Mix the silken tofu, sugar and vanilla sugar together. Whip the whipped cream and fold into the silken tofu. Drizzle the sponge fingers with coffee and cover the bottom of an approx. 5 cm high container. Put a layer of cream on top. Repeat twice more. Finally sprinkle with cocoa.
Let it steep in the refrigerator for at least 4 hours (overnight is even better).
Important:
Really take silken tofu, you can hardly taste the soy.