Boiled Icing

Directions

1. 1
   Combine sugar, boiling water, salt and cream of tartar in saucepan.
2. 2
   Stir until sugar is dissolved.
3. 3
   Boil to 230° on candy thermometer.
4. 4
   Pour sugar mixture slowly into egg whites, beating constantly.
5. 5
   Add vanilla and beat until thick and creamy.
6. 6
   Frosts 2 (9-inch) layers.