Dear McDonald's: about bloody time.
Yes, you're looking at a Chicken Big Mac. It's been part of the Maccas secret menu for a while - why wouldn't it be, it's better than a Big Mac after all - but the burger will officially be on the menu "for a limited time only".
It's not just the Chicken Big Mac that's getting the spotlight. Cheeseburger shaker fries are back on the menu as well, or fries with a dried coating of mustard, cheese, ketchup, onions and beef. (And since shaker fries were the only reason to get Maccas fries at all, that's a smart move on their part.)
If it were me, I'd just leave the Chicken Big Mac on the menu all the time. It'll certainly use up those extra McChicken patties. Either way, regular Maccas restaurants and ones with drive-thru are offering the Big Mac As It Should Be from today. Enjoy responsibly.