Mix the fat, sugar, 1 packet of vanilla sugar and salt until creamy. Stir in eggs one at a time. Mix flour and baking powder and stir in portions with 100 ml egg liqueur. Spread the batter into the springform pan. Bake in a preheated oven (electric stove: 175 ° C / convection: 150 ° C / gas: level 2) for about 35 minutes. Let cool in the mold for about 10 minutes. Then remove from the mold and let cool down completely.
Beat 500 g of cream until stiff, sprinkling in the cream setting agent and 2 packets of vanilla sugar. Fold in half of the chocolate shavings with a spatula. Spread it thickly on the surface of the cake and thinly on the edge. Press the remaining chocolate shavings onto the edge of the cake. Whip the rest of the cream until stiff and pour into a piping bag with a star nozzle. Sprinkle a decorative cream ring on the edge of the cake. Pour the rest of the egg liqueur into the center of the cake and smooth it out. Chill for about 3 hours. Sprinkle with chopped pistachios.