Use this recipe as a topping for our Pain Perdu, Meringue Cups, and Almond-Polenta Cake.
Place chocolate in a large heatproof bowl. Bring cream and liqueur, if using, to a simmer over medium-high heat; pour over chocolate. Let stand 10 minutes; stir to combine with a rubber spatula. Serve, or transfer to an airtight container. Refrigerate up to 3 days; warm by setting container in a bowl of hot water.