Fluffy KitchenAid Frosting
Source: KitchenAid
Yield: frosting for two (9-inch) layers.

1 1/2 cups sugar
1/2 teaspoons cream of tartar
1/2 teaspoon salt
1/2 cup water
1 1/2 tablespoons light corn syrup
2 egg whites
1 1/2 teaspoons vanilla

Place sugar, cream of tartar, salt, water, and corn syrup in saucepan. Stir over medium heat until sugar is completely dissolved, forming a syrup.

Place egg whites in bowl. Attach bowl and wire whip to mixer. Turn to speed 10 and whip until whites begin to hold shape, about 45 seconds.

Continuing on speed 10, slowly pour hot syrup into egg whites in a fine stream, taking about 1 to 1 1/2 minutes.

Add vanilla and continue whipping about 5 minutes or until frosting loses gloss and stands in stiff peaks. Frost cake immediately.