My mother used to make this as a base before making her marshmallow frosting on some of her cakes.
1 Put egg whites, sugar, water and syrup in top of double boiler. Beat until mixed well. Place over rapidly boiling water. Beat constantly with electric beater while it cooks for 7 minutes or until it will stand in peaks when beater is raised. Remove from heat. Add vanilla. Beat. Fills and frosts 2 layer cake, 8 or 9 inch.