Then Mary Berry did one on this week's Great British Bake Off Christmas edition and made it look so easy, so, armed with Mary's wise words we started.
It did take us nearly an entire day, but I think the result was worth it:
Daughter wants to eat it immediately, but I can't bear to break it up at all!
If you have a spare 7 hours this Christmas (ha ha!) and would like to make one, the instructions can be found here.