Ingredients

1/2 cup light-brown sugar 

1/2 cup heavy cream 

1/2 cup dark rum 

2 tablespoons unsalted butter, chopped 

Preparation

In a small heavy saucepan over medium heat, stir brown sugar and heavy cream until sugar is melted. Pour in rum, and simmer, stirring until the sauce is smooth, thickened, and reduced. Stir in butter until melted.