In a bowl sift icing sugar.
Add aquafaba and vanilla essence.
Mix with a spoon gently until all the ingredients are incorporated.
With a hand beater, beat the mixture for 2 minutes.
The icing will turn smooth, white, glossy and slightly fluffy.
Transfer to an air tight jar and use it when needed.
If making it ahead, store the jar in fridge and bring it back to room temperature before using.