Roughly chop the chocolate and melt it in a bowl over a warm water bath. Halve the avocados, remove the stone and remove the flesh from the skin. Puree the pulp, eggs, vanilla sugar and sugar.
Stir in chocolate. Mix almonds, cocoa and baking powder and stir in.
Line the bottom of a square springform pan (approx. 24 x 24 cm) with baking paper. Fill in the dough and smooth it down. Cake in a preheated oven (electric cooker: 175 °C/ circulating air: 150 °C/ gas: see
manufacturer) Bake for 20-25 minutes. Take out and let cool down. Remove the cake from the tin, cut it into pieces and dust with cocoa before serving.