Delicious fudge

1 c  Brown sugar
      1 c  Sugar
    2/3 c  Milk, condensed
      2 ea chocolate, unsweetened, squa
      2 T  butter
      2 T  corn syrup
      1 t  vanilla
      1 c  Nuts, chopped
 
  Cut the chocolate in small pieces and cook with the brown and
  granulated sugar, the condensed milk and the corn syrup. Stir until
  the sugar is dissolved. Then cook, stirring occasionally, until the
  fudge forms a soft ball when dropped in cold water. Remove from the
  fire, add the butter and let stand until it is cool. Then beat until
  it begins to lose its glossy appearance. Add the vanilla and the nuts,
  pour on a greased pan and allow to cool. Cut in squares.
  Source:  Pennsylvania Dutch Cook Book - Fine Old Recipes, Culinary
  Arts Press, 1936.