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this post was submitted on 08 Feb 2026
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Does Hershey's have a regional taste shift like coke does, based on where it was made? Atlanta coke vs Toronto coke is night and day. Hershey used to be made from Canadian milk shipped down in trucks.
Hershey has always had a sort of vomit aftertaste. The presence of butyric acid is the culprit. This compound is created when milk undergoes a process called lipolysis, which breaks down fatty acids to extend the chocolate's shelf life. Butyric acid is also found in human vomit, Parmesan cheese, and rancid butter. This is a direct result of Hershey engineering the chocolate to have a long shelf life. During the early 20th century, when refrigeration wasn’t reliable, the chocolate brand Hershey’s adopted a milk-stabilization process involving controlled lipolysis. The method kept milk usable for large-scale chocolate production as it traveled across country, but it also created butyric acid as a by-product. Butyric acid is perfectly safe to consume.
I always wondered if part of the problem is the long shelf life. I swear I’ve tasted some hersheys that was good. Perhaps it ages safely but rancid?