For the first time in the history of the Big Mac, McDonald’s mcd is testing out a new recipe.

The Big Mac was first introduced in 1967 and, for the first time in those 50 years since, McDonald’s is changing up the recipe by adding Sriracha. Don’t worry—the old Big Mac isn’t going anywhere. But now McDonald’s-goers in Central Ohio will be able to order a Big Mac that’s made with Sriracha Mac sauce.

The new recipe is being tested at 126 McDonald’s locations in Columbus, Ohio. It’s currently only being offered for a limited time, and will be removed from menus after December 31. However, if Ohioans decide that they like the new Big Mac, it could eventually be offered nationwide.

“There’s no doubt that the Big Mac is a legend and a great-tasting burger,” McDonald’s Chef Mike Haracz said in a press release. “We’re always trying new creations and we wanted to innovate with an on-trend flavor like Sriracha to give our customers in Columbus a new and exciting taste.” Sriracha began gaining steam within the past five years or so, despite the fact that Huy Fong Foods, the company that makes it, spends no money on advertising. With this move into the fast food world, what was once a fringe culinary trend seems to have now hit peak mainstream.

In addition to the Sriracha Big Mac, McDonald’s will also be serving up individual packets of the Sriracha Mac sauce.

Though this is the first time McDonald’s is changing up the flavor of the Big Mac, it did introduce a couple different variations of it this year. The company announced that, for a limited time in early 2017, it will be offering the Grand Mac and the Mac Jr. nationwide, which are essentially larger and smaller versions of the sandwich.