So how can you tell when your favorite candy changes? I compared current labels on the packages of Mr. Goodbar, Rolo caramels, and Almond Joy with past ingredient lists using the crowdsourced database Open Food Facts, a U.S. Department of Agriculture ingredient database, and data compiled by Richard Hartel, a food science professor at the University of Wisconsin-Madison who each year writes down ingredients in common chocolate bars for one of his classes.