This ganache is an added layer of chocolate in the already-luxurious Mocha Dacquoise Cake that Martha made on episode 612 of Martha Bakes.
Place chocolate in a medium bowl. In a saucepan, bring cream to a boil. Pour cream over chocolate, and let stand for 3 minutes. Whisk to combine. Refrigerate, covered, until thick enough to spread, 1 to 2 hours.