4 cups powdered sugar
3 tablespoons meringue powder
5 to 6 tablespoons warm water
1 teaspoon vanilla extract, optional
Sift the powdered sugar
Mix powdered sugar and meringue powder in a bowl
Add warm water gradually
Beat on low speed until combined
Beat on medium-high speed until stiff peaks form
Add vanilla extract if desired
Adjust with more water for thinner icing
Adjust with more powdered sugar for thicker icing
Cover tightly when not in use