Boiled Icing

Directions

1. 1
   Let sugar, water and vinegar cook to soft ball.
2. 2
   Pour 1/2 of syrup slowly over stiffly beaten egg whites.
3. 3
   Continue beating. Return remaining half of syrup to stove.
4. 4
   Cook until hard ball stage.
5. 5
   Pour slowly over other mixture, beating continuously until proper thickness to spread.