Mom's Chocolate Fudge

2 cup sugar
1/4 cup milk
1/4 cup evaporated milk
1 stick butter, cut into small pieces
1 tsp vanilla extract
1/2 cup cocoa, put through a sieve

Put sugar and both milks in heavy pan.  Stir over low-med
heat until mixture boils.  Add butter.  Stir until melted.
Bring back to boiling and keep at low boil, stirring
constantly with wooden spoon until soft ball stage (5-7
minutes).  A few drops of mixture dropped in a cup of cold
water should hold its shape but be malleable when rolled
between fingers.  Do not ever cook!  Stir in cocoa and
vanilla extract.  Beat until mixture becomes thick and
somewhat firm.  Add nuts and pour into buttered 8x8" pan.
[Allow to cool]