Place chopped chocolate in a small heatproof bowl.
In a small saucepan, bring cream just to a boil over medium heat. Pour hot cream over chocolate, and let stand for 1 minute. Whisk until smooth. Refrigerate, stirring occasionally, until slightly thickened, approximately 20 minutes.
Recipe by TeaTime Magazine at https://teatimemagazine.com/chocolate-ganache-filled-mint-thumbprint-cookies/