The Hands-Down Best Viral Fast Food Chain Orders We've Ever Seen - Chowhound

Alexander Farnsworth/Getty Images Secret menu items generally have three different origins. Sometimes they're orders a restaurant is willing to make regularly, but for whatever reason, the company hasn't yet added the item to its menu. The restaurant advertises these recipes via word of mouth, but it otherwise treats them like conventional orders. Occasionally, those items do become part of the official menu.…