Finely crush the chocolate. Finely grind brown bread in the universal chopper. Separate the eggs. Beat egg yolk, sugar and 4 tablespoons of warm water until frothy. Stir in espresso powder, bread and ground almonds.
Mix flour, baking powder and cocoa. Alternately stir in the cream. Fold in almond kernels and 3/4 of the chocolate. Beat the egg whites until stiff, fold in. Put the dough into a greased fat pan of the oven (32 cm x 38 cm) and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 40 minutes. Remove and let cool down for about 1 hour. Melt the rest of the chocolate in a hot bain-marie and draw stripes over the cake with a spoon. Allow to set (approx. 15 minutes).
Put the dough into a greased fat pan of the oven (32 cm x 38 cm) and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 40 minutes. Remove and let cool down for about 1 hour. Melt the rest of the chocolate in a hot bain-marie and draw stripes over the cake with a spoon. Allow to set (approx. 15 minutes). Dust the cake with icing sugar and cut into pieces