Gingerbread House Icing

Directions

1. 1
   In a large clean bowl, beat egg whites and cream of tartar with electric mixer at medium speed.
2. 2
   Add powdered sugar in small amounts, mixing well on high speed after each addition.
3. 3
   Beat on high speed 4-5 minutes or until mixture thickens.
4. 4
   Refrigerate, covered, until ready to use.
5. 5
   You may need to stir icing to soften before use.