A really lovely winter riff on the margarita. Yum. On the comments from people saying "I used apple cider" - I'm guessing these folk are in North America, where "apple cider" refers to pressed apple juice, i.e. what's called for in the recipe. Here in the UK, "apple cider" is an alcoholic drink with some carbonation, or what North Americans call "hard cider". That would change the cocktail completely, though I'm sure it would be interesting!