Oreo has rolled out dozens of new flavors over the past few years, now they've just taken it to a new level.

The newest Oreo flavor is a mystery. They come in a white package, and the cookies are the traditional chocolate Oreo cookies, but they're not telling you what the cream is.

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If you guess it right, though, you could have a shot at winning $50,000. Five other people who guess it right will win $10,000. You have until the end of November to submit your guesses to Oreo's website.

So what could it be? According to the people at "Food & Wine" who've tried them, it's either Fruity Pebbles or a more generic "cereal milk."

Oreo already did a Fruity Pebbles flavor called "Fruity Crisp," so maybe they're on to something with that cereal milk idea.

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