Double Boiler 7-Minute Frosting - cooking recipe

Ingredients

2 egg whites (1/4 c.)
1 1/2 c. sugar
1/4 tsp. cream of tartar or 1 Tbsp. light corn syrup
1/3 c. water
1 tsp. vanilla

Preparation

Combine egg whites, sugar, cream of tartar and water in top of double boiler.
Beat on high speed 1 minute with electric mixer. Place over boiling water (water should not touch bottom of pan); beat on high speed 7 minutes.
Remove pan from boiling water.
Add vanilla.
Beat 2 minutes longer on high speed.