Gary Mackay-Steven scored a hat-trick as Aberdeen swept hapless Hibernian aside at Pittodrie.
Graeme Shinnie swept in the opening goal on 11 minutes before a series of defensive blunders allowed Mackay-Steven to net twice before half-time.
Mackay-Steven then capped a great display with a smart curling finish.
Hibs, who had been unbeaten away from home in the league since March, grabbed a late consolation when an Anthony Stokes shot deflected in off Shinnie.
Aberdeen move into second place, three points clear of Rangers, who slipped to a surprise home loss to St Johnstone.