Ingredients

4 ounces bittersweet chocolate (61 percent to 70 percent cacao), finely chopped (3/4 cup) 

3 tablespoons unsalted butter, cut into small pieces 

1 tablespoon whole milk 

2 teaspoons light corn syrup 

Preparation

Melt chocolate and butter in a bowl set over a saucepan of simmering water, stirring until smooth. Remove from heat, and stir in milk and corn syrup. Use immediately.