Fudge Icing

Directions

1. 1
   Mix sugar and cocoa; add margarine and milk.
2. 2
   Cook over low heat, stirring, until margarine is melted.
3. 3
   (Cook without stirring until it forms a soft ball when dropped into cold water.)
4. 4
   Remove from heat; add vanilla and beat until it thickens enough to spread.
5. 5
   Covers 2 layers.