Finely puree the beetroot and oil with the blender. Add the eggs bit by bit. Mix flour, baking powder, cocoa, sugar, vanillin sugar. Add the vegetable puree and work into a smooth dough. Grease the pancake tin (2.5 litres capacity) and dust with flour.
Pour in the cake. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 45 minutes. Leave to rest in the pan for 10 minutes. Turn out onto a cake rack and let it cool down. Dust with icing sugar and cocoa powder
1 hour waiting time