Recipe from: The Story of Pure Vanilla, rewritten by R.C. Schlotterer.
Published by the Vanilla Bean Association of America, © 1955.
Combine egg whites, syrup, brown sugar and salt in top of double boiler. Place over rapidly
boiling water and cook, beating constantly with rotary beater for 7 minutes or until frosting
stands in peaks. Remove from heat. Add vanilla, beating in well.
Makes enough to cover top and sides of two 9-inch layers, or three 8-inch layers.