Seafoam Frosting
["3 c. light brown sugar", "1 c. boiling water", "2 egg whites", "1/4 tsp. cream of tartar", "1 tsp. vanilla"]
["Cook sugar and water until it spins a thread.", "Beat egg whites with cream of tartar.", "Pour syrup over egg whites; add vanilla and beat until it will stand in patties."]
["light brown sugar", "boiling water", "egg whites", "cream of tartar", "vanilla"]