Never Fail Fudge

Directions

1. 1
   Melt margarine over low heat and add milk; add cocoa and sugar.
2. 2
   Stir well, then turn setting to high and bring to a boil. Boil one minute on high, then turn down one notch and boil 1 1/2 to 2 minutes longer.
3. 3
   Remove from heat and add vanilla (and nuts, if desired).
4. 4
   Place pan in cold water and beat fudge until it loses its gloss and thickens enough to spoon onto waxed paper.