It was invented by a pharmacist who owned a small drugstore/restaurant in Lancaster County near the Susquehanna river. My parents still like to eat there.
Another small family company bought the Easter egg dye and still makes it today but it is getting harder and harder to find. You can buy it on the internet. They also have a funny PA Dutch history of Doc Hinkles egg dye on that site, too. http://dochinkles.com/Default.htm

