Mince pies. I buy them (because I’m hopeless at making pastry), and I get them all through December, not just for Christmas day. They’re harder to find at other times of the year but I would have them all year if I could.
Mulled wine is another thing we tend to have only at Christmas.
Turkey is the traditional Christmas meat here but my family prefers duck, so that’s what we’re having this year.
I can’t think of any other Christmas food that I wouldn’t have all year round. We don’t normally have so much of it at other times of the year though.
@Dog I have yorkshire pudding with just about every sunday roast. And sometimes in the week too, big dish-shaped ones filled with sausage and mashed potato and lots of onion gravy.