5tablespoonswarm wateradd more or less water to adjust texture
Using electric mixer with whisk accessory, mix meringue powder, powdered sugar and half the warm water on low speed.
Add more water to reach desired consistency. (I like mine about the texture of ketchup for detail work.)
Whip at medium/high speed for several minutes until smooth.
Store in an air-tight container.
To color, use gel food coloring. (helps colors not run)
You can store royal icing (made with meringue powder) in an air tight container for at least a week. You may need to re-whip with your mixer to bring back the texture.You can freeze in zip top bags. Thaw overnight in refrigerator. Re-whip with your mixer to bring back the texture.
Nutrition (approx. data estimated via online nutritional calculator.)