This sturdy, quick-drying royal icing holds gingerbread house pieces together securely and pipes beautifully for adding decorative details and attaching candy to your Christmas gingerbread house.
Whip Egg Whites: Place egg whites in a metalor glass mixing bowl and whip them for 1 minute.
4 large egg whites
Add Sugar: Add powdered sugar and cream of tartar and beat until smooth and standing peaks (about 4-6 minutes). Keep bowl covered with a damp cloth as you use the frosting (to prevent the frosting from drying out).
4 1/2 cups powdered sugar, 2 teaspoons cream of tartar