Step 1

Place the meringue powder and water in a large mixing bowl, and whip (with the whisk attachment) until foamy (about 3 minutes).

Step 2

Add the powdered sugar, and whip on medium speed until very stiff and thick (the royal icing should hold a stiff peak).

Step 3

Tint as needed with gel paste icing colors.

Step 4

Thin with additional water, a drop at a time, to get the desired consistency.