Burger King is causing a stir in Thailand with its new offering: a burger with no meat and a jaw-dropping amount of cheese. This week, the Thai operator of the fast food chain introduced what it calls the “real cheeseburger,” a bun filled with as many as 20 slices of American cheese.

The item launched on Thai menus Sunday, at a reduced price of 109 Thai baht ($3.1), compared with the usual price of 380 baht ($10.9). It quickly went viral on social media in Thailand, with many users on TikTok posting videos of them trying the new sandwich. “This is no joke. This is for real,” Burger King said.

At one Burger King branch in Bangkok on Tuesday, a shift manager was overheard saying the outlet had to stop taking delivery orders so they could have enough stock left for walk-in diners.

The menu addition is an example of how fast food franchises around the world are seeking to gain traction by rolling out zany or eye-catching menu options that they hope will spread across social media.

Restaurants are also continuously tailoring their offerings to suit local tastes in different countries. In Thailand, cheese is especially popular among young customers, and it is common for it to be sprinkled on all kinds of dishes.