Hershey Chocolate 🍫 developed a process that allowed them to use less-than-fresh milk. It’s their trade secret (so American). The process produces butyric acid, which gives Hershey’s chocolate its unique flavor. Butyric acid makes Parmesan cheese smell and is responsible for the taste and smell of vomit 🤢. (An answer to a European asking why American Hershey’s chocolate tastes horrible).