Royal Icing

Ingredients:

1 Pound (3-3/4 cups) powdered sugar, sifted if lumpy
1 to 2 large egg whites, or substitute 4 teaspoons packaged egg whites and 1/4 cup water
1 TSP almond extract, vanilla or lemon juice

Directions:

1. Mix all of the ingredients together using an electric hand mixer, until the icing is smooth and thin enough to be pressed through a pastry bag with a writing tip. Add more lemon juice, if necessary.

Recipe from http://www.foodnetwork.com/recipes/gingerbread-house-recipe.html