The subject of this article or section is part of Hallow's End, a seasonal event that lasts two weeks. Once the event has run its course, this will no longer be available until next year, but there are no guarantees.
When you defeated the Horseman, small pumpkin 'meteors' fall from the sky, landing on the party members. Each of these is a small random number of these treats.
Patch 4.2.2 (30-August-2011): Effect changed from a "Use: Dangerously sweet sugar-frosted taffy with a rich syrup center. Goes bad in only a day." to "Use: Dangerously sweet sugar-frosted taffy with a rich syrup center." and Hallow's End vendor currency. Icon () and stack changed (20 to 250).