2 cups semisweet chocolate chips
1 cup butter
4 cups confectioners' sugar
2 2/3 cups evaporated milk
1 teaspoon vanilla extract
1/8 teaspoon salt
In a large saucepan, combine the chocolate chips and butter. Cook and stir over low heat until melted.
Gradually mix in the sugar and milk. Increase heat to a boil. Cook, stirring constantly, for 8 minutes. Remove from heat, and then stir in vanilla and salt. Serve warm. Store in refrigerator.