In a small saucepan, heat cream and corn syrup over medium heat, stirring occasionally, until steaming. (Do not boil.) Immediately pour over chocolate. Let stand for 5 minutes. Starting in center of bowl, slowly stir with a rubber spatula until well combined. Use immediately. (The glaze thickens as it cools. If you need to soften the glaze again, microwave on high in 10-second intervals, stirring between each, until fluid and smooth. Or place the bowl in warm water, and let stand, stirring occasionally, until fluid and smooth).