Chips Ahoy is putting fans’ taste buds to the test with the launch of its first-ever Mystery Cookie, challenging shoppers to figure out the secret flavor for a chance to win a $25,000 prize. The mystery flavor will remain under wraps until Halloween, when the brand plans to reveal the answer. Anyone who thinks they’ve identified the mystery flavor can scan the QR code on the packaging or visit the official contest website to submit a guess. Mystery Cookie, we’re leveling up the snacking experience to match their energy. Article continues after adThe Mystery Cookie arrives less than a year after Chips Ahoy teamed up with Stranger Things for a limited-edition release featuring a chocolate cookie with a strawberry-flavored filling inspired by the show’s Upside Down.