Grease a springform pan (26 cm Ø) and dust with flour. Cream butter, 100 g sugar, spice and 1 pinch of salt for about 5 minutes. Stir in eggs one after the other. Mix flour and baking powder and stir in 3-5 tablespoons of milk alternately.
Fold in the hazelnuts. Brush into the mould. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 25 minutes. Let cool down for about 2 hours.
Soak gelatine in cold water. Mix 100 ml milk, 6 tablespoons sugar and pudding powder. Boil 400 ml milk. Stir in pudding powder and simmer for about 1 minute while stirring. Remove from heat and let cool down for about 10 minutes.
Squeeze the gelatine and dissolve in the hot pudding while stirring. Let it cool down for about 45 minutes, stirring frequently.
Drain mango well and dice. Cut the cake base in half horizontally. Close a cake ring around the lower cake base. Whip 100 g cream in a high mixing bowl until stiff. Fold cream first, then mango cubes into the pudding.
Spread on the lower floor. Place the second cake layer on top of the cake. Chill for about 2 hours.
Break the chocolate into pieces, melt in a small pot with 100 g cream and white fat over low heat while stirring. Let it cool down for about 5 minutes and possibly put it in a cool place for a few minutes until the mixture thickens a little, stirring more often.
Spread over the cake and then chill for about 2 hours.