At his candy factory In York, Pennsylvania, in the late 1930s, Henry C. Kessler first concocted this minty confection. The York Cone Company was originally established to make ice cream cones, but by the end of World War II the peppermint patty had become so popular that the company discontinued all other products. In 1972 the company was sold to Peter Paul, manufacturers of Almond Joy and Mounds. Cadbury USA purchased the firm in 1978, and in 1988 the York Peppermint Pattie became the property of Hershey USA.