3 egg whites

1/2 teaspoon cream of tartar

1 (16 oz) box confectioner's sugar

Combine all three ingredients in a large bowl. Beat for 5 to 8 minutes with an electric mixer until smooth and thick. Test with a knife blade and see if it leaves a smooth cut through the icing. Store in a tightly sealed container.

Powdered egg white substitute makes the recipe a bit easier to prepare--just add water as instructed on the packaging.

Use the icing as mortar to attach graham crackers to an empty milk carton for walls and to decorate the house and to attach colorful candies, crackers, pretzels, etc.