It seemed simple... in principle. Take equal parts of high quality dark chocolate and double cream (i.e. 200g choc to 200ml double cream) Chop the chocolate. Heat the cream to just before boiling and pour over the chopped chocolate. Wait a few minutes to allow the chocolate to melt, then whisk the chocolate and cream into a lovely runny mixture. Either pour over the cake now to get a thin coating or leave in the fridge overnight then bring out and allow it to come to room temperature and ice the cake like frosting.
As i say, sounds simple. Not in practice.
My ganache was rock hard even at room temperature and resembled solid truffles not ganache! It also tasted so strongly of bitter dark chocolate that it was virtually inedible except in small quantities. I had to rectify this situation so i made another batch of ganache, this time using milk chocolate. I mixed the new warm ganache into the dark chocolate ganache and it immediately loosened up the mixture. It also gave a sweetness to the ganache that was missing from the first batch.
It passed my husband's taste test getting a 10/10 score and it worked really well icing the cakes. Lesson learnt for next time!