Crumble the rusks and mix with the warmed Nutella. Spread the mixture on the bottom of a springform pan and chill.
Now proceed in layers: mix the cream cheese with powdered sugar and water and spread it on the floor. Sprinkle the nuts on top. Drain the sour cherries and spread over the nuts. Whip the cream with the cream stiffener and vanilla sugar until stiff and spread on the cherries.
Now only make the icing from 1/2 liter of the cherry juice and two packs of cake icing according to the instructions on the packet and pour it evenly onto the cream while it is still hot.