Jell-O

Although they marketed it as a dessert from its beginning in 1897, the makers of Jell-O have encouraged consumers to use the powdered gelatin in all sorts of foods. In the mid-20th century, it was promoted as a salad ingredient, with special varieties like celery-flavored Jell-O that have since been discontinued. (Go figure.) The tasty goo was also paired occasionally with fish or other meat -- a combination that's less surprising when you remember gelatin comes from pig skin, cattle bones and other animal parts. Yum!