Combine water and meringue powder in a bowl and beat with mixer until frothy.
Sift powdered sugar into the same bowl and mix to combine
Add syrup and extract if desired
Beat the icing for 4-5 minutes until it is glossy and holds a peak if the beater is turned upside down
Medium Consistency
Continue to add water ½ Tbsp at a time until at desired consistency (icing should disappear into itself in about 5 seconds after being dripped back into the mixing bowl).
Flooding Consistency
Continue to add water ½ Tbsp at a time until at desired consistency (icing should disappear into itself in about 3 seconds after being dripped back into the mixing bowl).