Lemon Marble Ring Cake

Directions

1. 1
   Preheat the oven to 180 C/365 F.
2. 2
   Butter a 22 cm (8,5 in) round ring mould thickly.
3. 3
   Separate whites and yolks of eggs.
4. 4
   Beat yolks and sprinkle in sugar and vanilla sugar. Continue beating until thick and pale yellow in color.
5. 5
   Beat egg whites until foamy. Set aside.
6. 6
   Add to the yolks of eggs the other ingredients - except the egg-white foam and cocoa powder - and mix together in food processor until well combined.
7. 7
   Add egg-white foam to the mixture and mix them carefully.
8. 8
   Pour two-thirds of the batter into the prepared mould.
9. 9
   Add the cocoa powder to the remaining mixture and mix it.
10. 10
    Spoon the cocoa batter on the top of the yellow one.
11. 11
    With a long thin knife, gently swirl the two batters to marbleize them.
12. 12
    Bake for about 45 minutes until risen and set, and a skewer inserted into the centre comes out clean.
13. 13
    Run a knife around the inner and outer edges, and leave to cool for about 30 minutes, then place a cake stand or plate on top of the tin and invert it.
14. 14
    Leave to cool completely.