Step 1

Combine all ingredients except vanilla in top of double boiler.

Step 2

Place water in bottom pan of double boiler. Cook over high heat 3-4 minutes or until water boils. Place egg white mixture in top of double boiler over rapidly boiling water (water should not touch bottom of pan); beat at highest speed with hand mixer 7 minutes or until mixture forms stiff peaks. (Do not overcook.) Remove from heat; add vanilla.

Step 3

Continue beating 2 minutes or until frosting holds deep swirls.