For the sponge cake batter, first separate the eggs and beat the egg whites with 1/3 of the sugar until stiff. Mix the egg yolks with the remaining sugar.
Add the water and vanilla extract and mix well.
Finally, fold in the sifted flour/baking powder and the beaten egg whites. Pour onto a baking tray (line with baking paper).
Bake in a preheated oven (180 °C )for about 10-12 minutes.
Preparation Tip:
Fill the sponge dough with jam or cream of your choice.