This portion worked well to slather on the cake when it was still soft and at room temperature, before it set up firm.
In the note area below, there are additional proportions that can be used for frosting, truffles, and filling for cookies.
Heat the heavy cream until it's hot (not boiling).
Place chocolate in a heatproof bowl.
Pour the heated cream over the top of the chocolate and allow it to sit for a few minutes.
Then begin to slowly mix or whisk the cream and softened chocolate together until thick and silky smooth.