Seven Minute Icing

Directions

1. 1
   Put all ingredients, except vanilla, in top of boiler.
2. 2
   Stir until well mixed.
3. 3
   Place over simmering, but not boiling, water. Cook, beating constantly with electric mixer at high speed, for about 7 minutes, or until icing becomes stiff and glossy.
4. 4
   Remove from heat and add vanilla.
5. 5
   Stir until blended.