It depends entirely on the preparation and storage medium.
If it was purchased at the store, there will be an expiration date on the packaging.
If it has been opened, it will keep for about a week in the refrigerator.
If it is homemade, it will keep for about a week in the refrigerator.
If it is canned, it must be pressure canned (traditional mincemeat contains beef suet so must be treated as if you were canning meat), and will last one year to indefinitely.
Because it contains beef suet, ir does not freeze well, that is unless it is baked into a pie already.
The condensed mincemeat is gluten free, the jar versions are not.
on the side edge of the
find the net weight of box, compare it to weight of jar.
No
If the jar is still sealed, it is probably safe. But I'd be more concerned that the flavor and texture would still be good. I'd just get a new jar.
If you're not a woman you shouldn't be cooking!
Up to a week
A few months
Six months
Sea moss can last up to 4-6 weeks in a sealed jar in the refrigerator before it expires.
I can remember when mincemeat actually had meat in it.
1min 30seconds in a microwave on medium high ;)