Note: Raw eggs should not be used in food prepared for pregnant women, babies, young children, the elderly, or anyone whose health is compromised.
Stir together the confectioners' sugar, meringue powder, and 1 1/4 cups water in the bowl of an electric mixer fitted with the paddle attachment. Mix on low speed until smooth, about 7 minutes. Add water, 1 teaspoon at a time, to achieve a consistency slightly thicker than honey. Icing can be stored airtight up to 2 hours.