INSTRUCTIONS
- Combine chocolate, milk and sugar in heavy saucepan.
- Stir constantly over medium heat until chocolate is melted and mixture comes to a boil. Turn off heat and add butter and vanilla.
- Stir until butter is melted. Let cool for 5 minutes before serving.
- Leftover sauce can be kept in the refrigerator for up to 2 weeks. It never lasts that long around here.