Place all the ingredients except the vanilla extract in the top of a double boiler (but don't place over boiling water yet.)
Add 1/4 cup of the burnt sugar syrup. With a small electric mixer, beat 1/2 minute at low speed. Place pot over boiling water, but don't allow the pan to touch the boiling water.
Cook, beating constantly, until the frosting forms stiff peaks, about 7 minutes. Add vanilla. Remove from heat and beat 2 minutes longer.Servings: