How long will Christmas cookes stay fresh in a tin?!
Answers: Until you eat them all.
One year
Three days max.
Not long....they need to be in an airtight container otherwise they go stale quickly. If you are not going to need them for several days just put them in a ziploc and freeze them.
About a week in a good tin with a good seal.
It totally depends on the type of cookie.
Some cookies with fruit almost preserve the cookie.
Dry cookies may last longer than moist.
Also if you keep the tin in the fridge moist cookies will last longer but dry ones might get wet.
Macaroons and such can last a long time in the fridge.
Best idea to me is freeze even a dozen at a time in baggies.