This is a very classic hot fudge for all your chocolate whims. Of course it is perfect for ice cream, but consider using it as a sauce over cheese cake ...yum.
Fill the lower pot of a double boiler half way and bring to a boil. Melt chocolate, butter, and salt together in upper pot. Add the sugar, 1/2 cup at a time, stirring after each addition.
Gradually add the evaporated milk, a little at a time and continue stirring until well mixed. Serve hot over ice cream. Extra sauce maybe stored in refrigerator and reheated in microwave.