Knead flour, butter in pieces, sugar, egg yolk, salt and 3 tablespoons of cold water first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Wrap in foil and chill for about 30 minutes
Grease a springform pan (26 cm Ø) and dust with flour. Roll out short pastry on it, place the edge of the springform pan around the base. Prick the short pastry base several times with a fork. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 20 minutes. Let the short pastry base cool down for about 10 minutes, remove from the springform pan
Soak gelatine in cold water. Coarsely dice the nut nougat. Mix pudding powder and 75 ml milk. Bring 300 ml milk to the boil in a pot and remove from the hot stove. Stir in the pudding powder, put it back on the hot stove and let it boil while stirring for at least 1 minute. Switch off the hotplate. First add nougat in portions to the pudding and melt in it while stirring. Then stir in pressed gelatine and dissolve in it. Put the nougat mixture into a bowl and let it cool down for at least 15 minutes. Then chill for 20-30 minutes.
Place the lady fingers on a tray and sprinkle with approx. 12 tablespoons of liqueur. Place the short pastry base on a cake plate and place a cake ring around the base. Sprinkle the base with approx. 4 tbsp. liqueur
Whip 400 g cream until stiff. When the nougat mass is cold and begins to gel, fold in 2 portions of cream. Spread 1/3 of the nougat cream on the shortcrust pastry base and cover with half of the lady fingers. Spread 1/3 of the cream on top and cover with the remaining ladyfingers. Spread with the rest of the cream. Chill the cake overnight
Whip 350 g cream and vanillin sugar until stiff. Remove the cake from the cake ring and loosely spread the cake rim with cream. Put the rest of the cream in a piping bag with a large perforated spout. Decorate the cake with 16 tuffs. Halve the layered nougat pralines diagonally and place one half on each or every 2nd tuff as desired
waiting time approx. 13 1/4 hours