Sieve the flour and cocoa and keep aside .
Cream sugar and curd till sugar has completely dissolved .
Add baking powder and baking soda and mix well.
Keep aside for 5 minutes till bubbles are formed .
Add cooking oil and vanilla essence and mix well .
Gradually add the flour and cocoa mix and blend with wet ingredients .
Beat well till creamy and thick .
Preheat oven to 200 deg C for 10 minutes .
Meanwhile grease a baking tin , line it with a parchment and pour the prepared batter .
Bake for 10 minutes and then reduce the temperature to 180 deg C.
Now bake for 30 - 35 minutes or till a skewer comes out clean .
Let the cake cool for frosting .
Do not forget to remove the lined parchment paper .