This site can help you. It lists a lot of Christmas Markets in Italy. It seems that there are two big Christmas market near Trentino.
Arco Christmas Market
Trento Christmas Market
It is difficult to say which one of these two is bigger, but I think the following quote about the Trento Christmas Market will suit you:
A real treat is the gastronomic event “Sapori del Mercatino”, which
involves 15 market booths, offering Trentino delicacies for
degustation.
Credit:stackoverflow.com‘
4 Mar, 2024
4 Mar, 2024
5 Mar, 2024
5 Mar, 2024