Roughly chop the chocolate. Cream fat and 75 g sugar with the whisk of the hand mixer. Stir in the eggs one by one. Mix flour and baking powder and stir in alternately with the cream. Fold in 50 g chopped chocolate.
Fill the dough into a greased springform pan (26 cm Ø), dust with flour and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 20 minutes (stick test). Remove, remove from the edge and let cool on a cake rack. Pour the pears into a sieve, collect the juice and fill up to 500 ml with water. Drain pears well and spread evenly on the sponge base. Mix the cake glaze and 3 tbsp. sugar in a saucepan and gradually stir in the pear juice. Add the rest of the chocolate and bring to the boil while stirring until the chocolate has melted. Spread the icing from the middle of the cake evenly over the pears. Chill the cake for about 45 minutes.
Mix the cake glaze and 3 tbsp. sugar in a saucepan and gradually stir in the pear juice. Add the rest of the chocolate and bring to the boil while stirring until the chocolate has melted. Spread the icing from the middle of the cake evenly over the pears. Chill the cake for about 45 minutes. Remove from the springform pan and cut into pieces. Dust with cocoa, decorate with chocolate slicer
waiting time approx. 1 1/2 hours