Roughly chop the chocolate and melt over a warm water bath. Melt the fat. Beat the eggs, 250 g sugar, vanillin sugar and salt until creamy. Carefully stir in the fat, half the chocolate and cocoa.
Sift the flour over it and fold in. Grease a springform pan (26 cm Ø) and sprinkle with sugar. Pour in the dough. Peel and halve the pears, remove the core and stem. Spread the pears in a circle on the dough with the cut surface downwards.
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 45 minutes. Beat the egg white until stiff, add 100 g sugar. After 15 minutes baking time, spread meringue on the cake, leaving an approx. 2 cm wide edge free.
Pour the remaining chocolate over the meringue and carefully fold it in with a spoon. Remove the finished cake, let it cool down and cut it into pieces.