Other fast food secret menus include fried chicken giant KFC, its Yum! Brands sister restaurants Taco Bell and even Subway, as all of these have been recently revealed to be in on this new trend.
The world\'s third-largest fast-food restaurant group\'s shares rise 7.5 percent to a five-month high on Monday after both chains posted a rise in second-quarter comparable restaurant sales.
Burger King hasn\'t released any information or posted the news on social media. The company\'s last tweet from its UK Twitter account was about \'Whopper Wednesdays\'.