The new Girl Scouts' Raspberry Rally cookies were intended to be limited edition - but the American organisation did not anticipate them being this much of a craze online.
After they sold out in less than a day, the popular sweet snack has begun to appear on reselling websites like eBay for as much as £100 ($120) per pack.
The new cookie, which is a remix of an old favourite - the Thin Mint - is described online as a "thin, crispy cookie infused with raspberry flavour and dipped in chocolaty coating".
Unlike other Girl Scouts cookies, the Raspberry Rally was advertised as the first "online-exclusive" sold by the organisation - but they only cost approximately £5 ($6) per box.
The business said the new sales model was to teach Scouts "new skills and build their ecommerce business", as well as raise funds for trips, service projects and summer camps.
"Financial literacy is not only a critical skill required for entrepreneurship, but an essential life skill," the Girl Scouts' chief revenue officer Wendy Lou said.
Despite the surge in popularity, Girl Scouts is reportedly not pleased with the ginormous profits that resellers are making online.
"When cookies are purchased through a third-party seller, Girl Scout troops are deprived of proceeds that fund critical programming throughout the year," the organisation told CNN Business.
The cookie "proved to be more popular than anticipated" though it is unclear whether Girl Scouts plan to restock their reserves before the end of this year's sales in April.
On Twitter, people have shared their shock and disgust at the high prices of the cookies, ranging from £25 ($30) to £100 ($120).
"People are shameless. They're scalping $6 boxes of raspberry Girl Scout cookies on eBay," one person said.
Another wrote: "That's insane", while a third said: "Girl Scout cookies aren't that great".
While foodies and Scouts may be disappointed, eBay has declared that it has no plans to pull the listings.
"We strongly support the entrepreneurial spirit of hardworking local Girl Scout troops and encourage cookie-seekers to also support their local Girl Scouts," eBay said in a statement to CNN.
"However the sale of Girl Scout cookies does not violate eBay policies."
