Ok now here is a useless little interesting fact I read and researched.

Some of the commonest archaeological finds in Ireland are barrels of ancient butter, buried in the peat bogs: they flavored butter heavily with garlic, knuckled it into a wooden firkin, and buried it for years in the peat bogs ‑ for so long that people were known to plant trees to mark the butter’s burial site. The longer it was left, the more delicious it became.

It is believed possible that the practice of burying butter in Ireland ceased about the end of the 18th century and that many of the specimens which have been found are of far greater antiquity,  9th to 14th century.

Although most of butter found today is not edible it does usually  still retain its buttery smell and texture and was not rotten.

Hugs and Biscuits