Story highlights Tourists and locals queue for several hours to get their hands on Jenny's butter cookies

People are even hired to stand in line to buy the cookies, which are later sold at an up-to-70% mark-up

Food frenzies have also taken place in other parts of the world

Hong Kong (CNN) There's a booming black market in Hong Kong, but it's not for fake Apple Watches, or the iPhone.

Instead, people are going crazy for tins of butter cookies.

Tourists and locals line up around the block for several hours just to get their hands on Jenny's cookies -- at $9 a tin.

Its popularity has spurred bakeries to make and sell knockoffs, and the original store has signs warning against buying 'fake' Jenny's cookies.

The tiny shop, located in Tsim Sha Tsui, one of the city's main shopping districts, is swarming with people handing over wads of cash for the "little bear cookies" as they are known across Asia.

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