Mix and your eggs one by one each

Mix add vanilla essence

Mix add your flour and baking powder

Add water mix and pour half of your dough in another bowl

Then on one bowl pour your cocoa powder and mix

Take a round or rectangle pan and butter it

Take two spoons and put in the two dough's

Pour 1spoon of cocoa dough and on top a spoon of your plain dough

While doing that heat oven to 180'c

When ready put in the oven and leave for 45minutes-1 hour