Cream butter, sugar and vanilla sugar with the whisk of the hand mixer. Add the eggs and continue stirring until the mixture is light and creamy. Stir in 100 ml egg liqueur. Sift flour, baking powder and cocoa powder over it, stir in briefly and fold in chocolate drops. Wash, peel and halve the pears, cut out the core
Grease a springform pan (26 cm Ø) and dust with flour. Pour in the dough, place the pears next to each other in a circle with the cut surface facing down and press them on. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 50 minutes (stick test). Spread the pears with approx. 2 tbsp. liqueur and let them cool down on a cake rack
Roast the flaked almonds in a pan without fat until golden brown, remove. Sprinkle the cake with almond flakes and dust with icing sugar before serving