Micca,
Never tried it, so cannot make a judgement, however I am aware that wombat is rather fond of it, so it may work. However I first came across Cranachan when I was invited to dine in Glenturret Distillery ................I suppose they have a interest in using whisky
Glenturret, incidentally make a rather pleasant Whiskey liquer themselves but did not use it for the Cranachan so that may give you some indication