Yogurt And Chocolate Cake

Directions

1. 1
   Preheat oven to 180 degrees Celsius.
2. 2
   Beat the sugar with the butter to whitish cream.
3. 3
   Add the egg yolks and yogurt, and continue beating until you have a very creamy mixture, and finally, add the flour.
4. 4
   Beat the egg whites, and very carefully mix in with the batter.
5. 5
   Pour most of the batter into a greased and floured bundt pan.
6. 6
   Mix the remaining batter with the cocoa powder.
7. 7
   Pour the cocoa mixture on top, and bake for 30 to 35 minutes.