Sieve maida twice and keep aside.
Cream sugar and curd until sugar completely dissolves.
Add baking powder, baking soda to the creamed mixture and mix well.
Leave aside for 5 mins and you can see the bubbles appearing.
Now add vanilla essence, cooking oil and mix well.
Gradually add maida in portions at a time and blend with wet ingredients.
Beat well with a whisk until creamy and thick.
Preheat oven to 200 deg C for 10mins.
Meanwhile grease a butter paper, lay it in the cake tin or loaf pan and pour the batter into the tin and keep it ready.
Bake in a preheated oven at 200 degrees C for 10 mins, then reduce temperature to 180 deg C and bake it for 30-35 mins or till a fork inserted into the centre of the cake comes out clean.
Allow the cake to cool down for 10mins, then invert and remove the butter paper.