Oreo O's
Cookies for breakfast, officially sanctioned. Post's Oreo O's were little chocolate cereal loops flecked with cream that turned the milk a chocolatey brown — and then, one day, they vanished, becoming one of the most mourned discontinued cereals of the era.
Oreo O's hit shelves in 1997, made by Post under license to the Oreo brand. The appeal was pure kid logic: a bowl of chocolate O's that tasted like the cookie and left behind sweet, cookie-tinged milk. For a decade it was a cereal-aisle regular.
Then, in 2007, it disappeared — and not for the usual reason. Post owned the cereal recipe, but Kraft owned the "Oreo" name, and when the licensing arrangement fell apart, neither side would give up its piece, forcing the cereal off shelves worldwide. Almost. In South Korea, a licensing quirk let Dongsuh Foods keep producing it the entire time, which spawned years of folklore about fans importing boxes from Korea just to taste their childhood again.
The standoff eventually resolved, and Oreo O's returned to U.S. shelves on June 23, 2017 to genuine fanfare. Its on-again, off-again life since has only cemented its status as the cereal a generation didn't appreciate until it was gone.
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