Preheat the oven to 180 degrees top/bottom heat.
Separate the eggs for the sponge.
In a fat-free bowl, beat the egg whites with a pinch of salt until stiff and slowly add 100g sugar.
In a separate bowl, whisk the egg yolks with the 4 tbsp hot water, 20g sugar, vanilla sugar and vanilla paste until foamy.
Tip: You don't need to wash the mixing sticks if you do it in this order.
Now add the beaten egg whites to the egg yolk mixture and sift the flour, cornflour and baking powder on top. Now carefully fold in the mixture with a whisk.
Tip: Only fold in once so that the air remains in the sponge!
As soon as everything has combined, immediately place the mixture in the high cake ring, set at 20cm, and bake for approx. 25-30 minutes.
Tips:Do not grease the high cake ring.Pour the mixture directly into the high cake ring and place in the oven.Do not open the oven for the first 20 minutes. When nothing sticks to the chopstick (push a wooden chopstick into the sponge cake), the sponge cake is ready and can be taken out of the oven and cooled in the tin.