Subway's cookies are so popular the chain will no longer allow customers to order them online as it struggles to keep up with the high demand, according to several media outlets.

USA TODAY has reached out to Subway but have not yet heard back. The menu item is no longer available on Subway's app.

Subway said there is an "unprecedented demand" for its new $5 footlong cookies. The footlong cookie, first introduced back in December for National Cookie Day at select stores, is a part of the new Sidekicks menu released in January which includes a footlong pretzel from Auntie Anne's and a footlong Cinnabon churro.

CNN reports the surprising demand for the cookies led to Subway removing them from third-party delivery apps, like DoorDash. But the churro and cookies demand are still available for online orders.

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Subway's footlong cookie and other new Sidekicks menu items see success

Subway announced that the sidekick menu is a total hit and already passed sales expectations announced this week.

It said that over 3.5 million sidekicks have been sold, with the most popular item being the foot-long cookie. In a statement, the chain said the new items are a part of its latest initiative.

"Sidekicks are a big hit with guests and the latest proof that Subway is a remarkably different brand than it was when we began our transformation journey three years ago," said John Chidsey, CEO of Subway in a statement.

According to the sandwich chain, subway customers can expect to see new menu items in 2024

This article originally appeared on USA TODAY: Subway footlong cookies: So popular chain can't keep up with demand