Hi I am attempting to make some home made MRE’s for long-term preparedness storage. They will consist mainly of dried goods (pre-flavoured rice / pasta / noodles etc) plus some candy bars, tea, coffee etc. Assuming that the shortest lifespan (sell-by date) is on the candy bar – lets say 1.5 years – how much [...]

You don’t really need to go to that length. Keep it in an airtight container and stick it in the freezer. You’ll use it all up before it goes bad.