Make your own royal icing by beating 3 egg whites with 1/4 tsp white vinegar in a large bowl using an electric mixer, until foamy. Gradually beat in 5 cups sifted icing sugar until combined. Increase speed to high and beat until icing is thick but still foamy, 3 to 7 min. Stir in 2 to 3 tbsp cold water to thin the icing to desired consistency. It should be thick and smooth.
Originally published in the Today’s Parent November 2015 issue. Photo: Tony Lanz.