Preheat the oven to 190°C.
For the sponge cake, first whip the eggs and sugar with 25ml of water until foamy.
Mix the remaining ingredients and mix them in.
Then fold in the melted butter.
Line the bottom of the baking pan with baking paper and grease the edges. Put the dough into the form and bake for about 35 minutes until golden brown.
Take the sponge out of the tin and let it cool down well.