In a bowl, add powdered sugar and egg. Beat it well until it gets fluffy
Now add baking powder, baking soda, vanilla essence and oil.
Also, add orange juice.
Mix well using a whisk.
Now sift the all-purpose flour and add in cake mixture.
Fold the mixture using the whisk in one direction (clockwise).
Now add orange zest and mix again.
Grease the cake pan and place butter paper.
Pour the cake mixture in cake pan.