In a bowl, add the measured quantity of oil, sugar, eggs and vanilla essence.
Beat the ingredients thoroughly using a cake mixer.
Sieve together the measured amount of maida, cocoa, baking soda, baking powder and salt.
On a low speed mix in a third of the flour mix followed by curd and water.
Repeat with another third of flour mix followed by curd and then water.
Finally add the remaining flour mix, curd and water.
Blend all the ingredients well to get a smooth batter.
Pour the batter into a greased baking pan.
:- If desired sprinkle chocolate bits over the batter.
Bake in the oven at 350F(175C) for 30 mins or until a toothpick or wood skewer thrust into the center of the cake and withdrawn is clean or only has dry crumbs attached.