Ingredients

3 ounces bittersweet chocolate, preferably 70 percent cacao, chopped 

1 1/2 tablespoons unsalted butter 

2 teaspoons pure vanilla extract 

1/3 cup heavy cream 

1/3 cup sugar 

1 tablespoon instant-espresso powder 

1/4 teaspoon coarse salt 

Preparation

Combine chocolate, butter, and vanilla in a bowl. Bring cream, sugar, espresso powder, and salt to a boil in a small saucepan, stirring until sugar and espresso powder are dissolved. Pour over chocolate mixture and whisk until smooth.