marshmallow Icing Yield: 6 Servings * 1 1/2 c sugar * 1/8 ts cream of tartar * 8 Diced Marshmallows Or 1 1/2 Tbsp marshmallow -Cream * 3/4 c Boiling water * 1 egg White, Stiffly Beaten * 1 ts vanilla Few grains salt Combine sugar, water, cream of tartar, And salt. Boil to Soft BallStage (236 F). Add Marshmallows to egg White. Add Syrup Slowly,Beating Constantly, Until Thick And Creamy. Add Flavoring.