Beat the eggs, sugar and vanilla sugar in a mixing bowl until frothy. Slowly stir in the oil.

Put the flour, baking powder and the ground hazelnuts in a larger bowl and mix everything well. Gradually stir in this mixture with the yoghurt.

Pour the dough into the prepared Gugelhupf tin and smooth it out. Now place the cake in the (fan-assisted) oven preheated to 180 degrees and bake for approx. 55 - 60 minutes. (Chopsticks sample)

Take the baking time out of the oven and let it cool down in the tin. Turn the cooled bundt cake out onto a cake plate and sprinkle with powdered sugar.