...when you say "biscuits", what do you mean?
The British in me is confused by "tube", "fridge" and indeed "cook" in relation to biscuits...
like this but accidentally vegan
https://3.bp.blogspot.com/-I7DrAZEiFDY/UKrXDiMb1YI/AAAAAAAAICw/-hZCCutm_1k/s1600/DSCN0625.JPG
Ah, yeah. I keep meaning to find a recipe and try making them.
(I'd cook 'em, depending on how long the original expiration period was. I'm of the view that anything with an expiration period measured in days/weeks probably needs attention, anything in the several months/years expiration period is probably arse-covering by the producer. Note: I have no real scientific reason behind this)
My reasoning here is that anything that involves water and starch and has to live in a refrigerator is actively decaying no matter how many preservatives are packed in it. If it's wet and has carbs or fat in it, it WILL go bad.
I am pretty much infinitely tolerant of anything completely dry and sealed, that does not need refrigeration. Also I basically go by the "if it's not slimy or black it's fine" for vegetables.
@neonsnake @rechelon I once sampled some Ferrero Rocher hazelnut/chocolate thingies that had been in a suitcase in a non-climate-controlled basement for a decade and the wafer shell was mushy but the overall experience was pretty inoffensive