EDIT: Sorry I meant the title to be Almond Butter!

Hi all, I have seen a few people mention this and also in primal recipes - is this something that can be substituted with 'normal' butter, as I don't know if it's sold in supermarkets here in the UK, although I have seen it online.

Is it an essential part of the primal way of eating? I've just seen it mentioned so much I thought I might be missing something.

Total newbie and finding out more about paleo at the moment, thanks