Wash and sort blackberries. Wash lemon hot, grate dry and grate peel thinly. Whisk butter, salt, sugar, vanillin sugar and lemon zest with the whisk of the hand mixer until thick and creamy
Stir in the eggs one by one. Mix flour and baking powder and stir in alternately with the yoghurt. Grease the cake pan (approx. 2.5 litres capacity) and sprinkle with flour. Dough alternate with approx. 2/3 of the blackberries, distribute evenly. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 1 hour
Take the cake out of the oven, let it rest in the mould for about 10 minutes and then turn it out of the mould. Let the cake cool down
Puree the remaining blackberries, except for a few for decoration, and pass through a sieve. Stir half of the icing sugar and blackberry puree to a smooth glaze. Stir the remaining icing sugar and 1-2 tbsp. water until smooth. Spread the icing on the cooled down cake
Halve the blackberries. Cut chocolate into thin shavings with a peeler. Decorate cake with chocolate and blackberries
waiting time approx. 1 1/2 hours