Everyone’s favourite sandwich cookie is about to launch a new flavour, and no one knows what it is.

A new limited edition Mystery Oreo flavour will be launching in Canada on Monday, September 16th, and you’ll want to lick the centre as soon as you get your hands on it!

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These cookies will look like the classic Oreos we all know and love, but have an entirely different flavour that you’ve got to guess.

Until November 10th, Oreo fans can submit their guesses online at http://www.mysteryoreo.ca/ for a chance to win $25,000! You can even submit a new flavour guess everyday, if you wish.

Every correct guess is counted as an official entry to the sweepstakes, with one randomly chosen grand prize winner receiving $25,000.

Think you can crack the case?