I’m making DDs cake and trying to make ganache icing for the first time. I’ve warmed cream and added to chocolate pieces and left for hour to cool. It’s still a lovely bowl of chocolate- just tried to whisk it to become fluffy and nothing’s happened, it’s just stayed liquid!! I used same quantity of cream to chocolate- why isn’t it whisking into icing kind of consistency? Does anyone have any ideas?! It’s too runny at moment to eg stick cake pieces together, which I need it to do! All suggestions v appreciated!!