Burnt Sugar Icing

Directions

1. 1
   Put three cups of the sugar and the milk in a saucepan; heat to boiling point.
2. 2
   Put remaining cup of sugar in an iron skillet over low heat; stir as sugar melts and becomes a light brown.
3. 3
   Remove skillet from heat and slowly pour in the sugar-milk mixture from saucepan, stirring all the while.
4. 4
   Return to heat and cook until a small dab of the mixture forms a soft ball between the fingers when dropped into cold water.
5. 5
   Add margarine, vanilla and salt; allow to stand for five minutes.
6. 6
   Beat until stiff enough to spread on cake or use as candy.