HEAT half-and-half and granulated sugar to a gentle boil in small, heavy-duty saucepan. Remove from heat. Add chocolate and butter. Stir until mixture is smooth and chocolate is melted. Serve warm over fresh fruit, ice cream or your favorite dessert. Or, transfer to resealable container and refrigerate.
TO REHEAT, microwave on HIGH (100%) power for 15 to 30 seconds; stir.