Chris Scott's men were 18 points down at the 11-minute mark of the second quarter, but the game changed completely between then and the two-minute mark of the final term.
The Cats booted 11.4 to 1.13 in that period, grabbing a 27-point lead by the final change, and they went on with the job from there, winning 17.11 (113) to 11.19 (85).
The result continues Geelong's recent domination of Essendon. The Cats have now won eight of their last nine games against the Bombers.
Midfielders Steve Johnson (who had an equal career-high 36 possessions) and Mathew Stokes were among the many stars for the winners.
First-gamer Jackson Thurlow – the club's first pick in last year's NAB AFL Draft – also looked very comfortable at the highest level.
Elsewhere, ruckman Mark Blicavs continued his remarkable debut season by kicking two goals, while Steven Motlop also showed repeated flashes of brilliance up forward, yet some inaccurate finishing meant he finished with just 1.3.
Geelong showed off the flexibility that coach Chris Scott has been working hard to create, with key defenders Tom Lonergan and Harry
Taylor both spending time in the forward line, while usual forward James Podsiadly played as a key defender at times.
Lonergan made the most of his opportunities up forward, booting two goals.
But the Cats have some injury concerns. Tagger Taylor Hunt was subbed out of the game with a shoulder problem during the first quarter after copping a heavy bump from Essendon onballer Jake Melksham.
Tom Hawkins, who went into the game with a stiff back, looked well below full fitness. He struggled to run freely and found it almost impossible to jump into marking contests, although he still chipped in with two majors.
Midfielder James Kelly is also likely to come under scrutiny from the match review panel for a high bump on Brendon Goddard late in the third quarter.
David Zaharakis, who was tagged by Hunt during the opening stages of the game, made the most of his opponent's injury by finishing as Essendon's leading ball-winner with 31 possessions.
Zaharakis was instrumental in the Bombers' impressively manic start to the contest, gathering 13 touches in the opening quarter, but, like many of his teammates, faded after the midpoint of the second term.
Heath Hocking was Essendon's most influential player. He limited Geelong skipper Joel Selwood to just 19 touches while gathering 19 of his own and kicking a goal.
But the Bombers' big forwards had little impact on proceedings, with Michael Hurley, Stewart Crameri and Scott Gumbleton kicking only three goals between them.
Key backman Jake Carlisle was very good against Hawkins during the first quarter, but in the end Essendon's defence, which had conceded an average of just 72 points per game during its first six matches of the season, was well beaten.
Adding to the Bombers' problems, small Alwyn Davey was subbed out of the game in the third quarter with a hamstring injury.
The Cats will be aiming to continue their winning streak when they take on Collingwood in another blockbuster next Saturday night at the MCG.
In contrast, the Bombers will be confident of getting back on the winners' list when they meet the Brisbane Lions at Etihad Stadium next Saturday afternoon.
GEELONG 2.2 7.7 13.9 17.11 (113)
ESSENDON 2.5 6.9 7.18 11.19 (85)
GOALS
Geelong: Stokes 3, Blicavs 2, Hawkins 2, Lonergan 2, Smedts 2, Bartel, Christensen, Duncan, Motlop, Schroder, Selwood
Essendon: Gumbleton 2, Myers 2, Bellchambers, Crameri, Davey, Goddard, Hibberd, Hocking, Hurley
BEST
Geelong: Johnson, Stokes, Motlop, Kelly, Enright, Blicavs, Smedts, Lonergan
Essendon: Hocking, Zaharakis, Goddard, Howlett, Heppell, Myers
INJURIES
Geelong: Taylor Hunt (right shoulder)
Essendon: Alwyn Davey (hamstring)
SUBSTITUTES
Geelong: Jordan Schroder replaced Taylor Hunt in the first quarter
Essendon: Nathan Lovett-Murray replaced Alwyn Davey in the third quarter
Reports: Nil
Umpires: Rosebury, Stevic, Ryan
Official crowd: 53,014 at Etihad Stadium
