How to make
Beat the eggs with the sugar, add the yoghurt in which you've extinguished the baking soda and stir once more. Add the vanilla and oil.
Sift the flour with the baking powder and carefully add it to the above mixture. Oil a cake form, sprinkle some flour in it and pour in the majority of the mixture.
In the remaining part, dissolve the cocoa and then add it to the rest. Bake in a moderate 360°F (180 °C) oven for about 40 min. or until fully baked. After it cools, sprinkle it with powdered sugar.