Gingerbread House Icing

Directions

1. 1
   In a mixing bowl, whip egg whites until foamy, then add cream of tartar. Continue to mix for 30 seconds.
2. 2
   Add in powdered sugar a little bit at a time mixing well.
3. 3
   Once the powdered sugar is incorporated, turn mixer to high and continue beating until thick and the icing holds its shape (about 3-5 minutes).
4. 4
   Store well covered.