Roasted chestnuts.
Hot mulled cider.
In the Alps, not on the street , but outside, at ski resorts:
Tiroler Gröstl (fried onions,potatoes and bacon, with a fried egg on top)
Bratwurst
Schnitzel on a bun
Käsespätzle
Bombardino (avocat cocktail with cream on top)
Mulled wine
Jägertee
Obstler /fruit schnapps shots
In Toronto (these are year-round, but available all winter, when many other carts or food trucks aren’t out selling food):
Hot dogs
Polish sausage
Italian sausage
Freshly cut French fries with gravy
Poutine