Ingredients

1/2 cup plus 2 tablespoons sugar 

1/2 cup heavy cream 

2 1/2 ounces unsweetened chocolate, chopped 

4 tablespoons unsalted butter 

1/2 teaspoon pure vanilla extract 

Preparation

Place sugar and cream in a heavy-bottomed saucepan; bring to a boil over high heat, stirring constantly. Reduce heat to medium and simmer, without stirring, about 5 minutes.

Remove saucepan from heat and stir in chocolate until melted. Stir in butter and vanilla until well combined. Chill, stirring occasionally, until cooled completely.