The Blues were the better team in the first half, with tries from Kotoni Staggs and Origin debutant Mark Nawaqanitawase leading Laurie Daley's side to a four-point lead at half-time.
However the Maroons came out after half-time firing, with Cobbo grabbing a quickfire pair of tries inside 11 minutes.
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Jojo Fifita followed up with a try soon after, with Staggs being sent to the sin bin for a high tackle on Queensland full-back Kalyn Ponga.
Queensland made the Blues pay, with Ponga just managing to get an offload away to Hamiso Tabuai-Fidow, who ran in for a try, before prop Lindsay Collins capitalised on a sensational break from Harry Grant to also score.
Cobbo wrapped up the match with a brilliant finish just inside the corner to give the Maroons plenty of confidence heading into the series decider on Wednesday, July 8.
More to follow...
