If you live near a branch of the German supermarket chain Lidl, keep an eye out for these - Spekulatius, spiced ginger biscuits. I happened on them a few years ago when I was living in Vienna. They're absolutely divine, and our branch of Lidl, at least, has them on offer (80p or so for a 600g bag). They are a purely Christmas thing, though, so be sure to get them in the next few weeks. Your tummy will love you forever.*
*I was going to say, "they're better than sex," but actually, you'd have to be pretty bad at sex for that to be true.