Heat cream in heavy-bottomed large saucepan over medium-high heat until simmering
Remove from heat
Add chocolate all at once and stir until partially melted
Let stand for 15 to 20 minutes to complete melting
Stir mixture again until completely smooth and all chocolate particles are melted
Cover surface of chocolate mixture with waxed paper or plastic wrap to prevent crust from forming
Refrigerate ganache until extremely cold, at least 12 hours.
Lightly whip before using.