Wash, clean and grate the zucchini. Cream fat, sugar, vanilla sugar and salt with the whisk of the hand mixer. Stir in the eggs one after the other. Mix flour, 60 g cocoa and baking powder. Alternately stir in the flour mix and yoghurt. Finally fold in the zucchini
Pour the mixture into a greased springform pan (approx. 24 cm Ø) and bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 35-45 minutes (stick test). Take out the cake, remove from the edge and let it cool down in the mould on a cake rack
Lightly roast the pistachios in a pan without fat. Take them out, let them cool down a bit and chop them roughly. Whip butter and icing sugar with the whisk of the hand mixer until very light and creamy. Stir in 100 g cocoa. Straighten the cake if necessary, then cut it in half horizontally. Spread the cream on the two halves of the cake and sprinkle with pistachios. Put the cake on top of each other and chill for about 2 hours
Preparation time 1-1 1/4 hours. Waiting time approx. 3 hours