Mix powdered sugar and meringue powder together in mixer on low.
Add water and slowly start to mix.
Once incorporated, increase mixer speed to medium/ high and mix for 2 minutes until white, opaque and slightly fluffy.
Icing is ready to use!
To make flood icing, you can thin with a teaspoon of water at a time until desired consistency is reached.
Icing can be stored in an air tight container for up to 7 days.