A pricey handball stung St Mirren for the second recreation in a row as extra Premiership factors had been spilled at Pittodrie.
The Buddies had been holding their very own towards Aberdeen earlier than Declan Gallagher was given his marching orders after dealing with within the field, with the Dons netting the opener from the penalty spot - simply as Motherwell had six days earlier.
Bojan Miovski blasted the hosts in entrance, earlier than rapidly making it two after pouncing to beat Saints keeper Trevor Carson to a deflected cross on the close to submit.
Liverpool loanee Leighton Clarkson produced an exquisite third on his debut, firing into the highest nook from distance to place former St Mirren boss Jim Goodwin's aspect in cruise management on the break.
Stephen Robinson's males got here out preventing within the second half, with Jonah Ayunga decreasing the deficit from the spot after Greg Kiltie was bundled over within the field.
However ultimately the Dons held on to assert their first win of the marketing campaign, with Stephen Robinson's aspect nonetheless ready for his or her first level.
Curtis Fundamental and Gallagher each returned to their previous stomping floor, whereas Greg Kiltie returned from suspension simply in time to switch Mark O'Hara who missed out after his head knock towards Motherwell.
Richard Tait slotted in at left wing-back rather than the injured Scott Tanser, with Fundamental most well-liked to Alex Greive up entrance alongside Jonah Ayunga because the Buddies kicked off with a 3-5-2 formation.
The Buddies began brightly, with Fundamental virtually selecting out a teammate within the field after a pleasant transfer sprung by an Ethan Erhahon interception.
The Dons started to press again, with Ylber Ramadani turning previous Erhahon earlier than unleashing a robust strike that rippled the roof of the web with Trevor Carson scrambling on the road.
Gallagher, who had already obtained a lower than heat welcome again from his former followers, picked up the primary reserving of the afternoon aftering lunging in on Hayden Coulson.
That pressured Goodwin into an early change, with new signing Leighton Clarkson making a faster debut than anticipated after becoming a member of from Liverpool on the morning of the match.
Clarkson had the right alternative to announce his arrival just some minutes after stepping off the bench. Because the ball broke to him unmarked on the sting of the field, he might solely blaze wastefully large.
Fundamental virtually broke into the field because the Saints fought again. He turned inside one defender however could not beat one other as the prospect went begging.
St Mirren had been doing their finest to interrupt the impasse early on. A intelligent Ryan Pressure ball in behind launched Fundamental down the correct wing, with the striker bursting to the byline earlier than fizzing a move throughout purpose that Kiltie simply could not get a toe on on the again submit.
Regardless of their promising begin the guests' job obtained infinitely more durable when Gallagher obtained his marching orders after simply 22 minutes.
Aberdeen initially labored the ball fantastically alongside the road earlier than teeing up Vicente Besuijen in acres of house.
His curling strike beat Carson however crashed again into the field off the submit, with Liam Scales' effort desperately blocked by Gallagher on the bottom.
Referee Alan Muir was sure the Scotland worldwide had dealt with the strike, regardless of the centre again insisting it hit his chest, with Bojan Miovski emphatically placing away the ensuing penalty to open the scoring.
St Mirren reverted to a again 4 in Gallagher's absence, nevertheless it was quickly two for the Dons as Jonny Hayes' deflected cross to the entrance submit was pounced on by Miovski.
The assured striker capitalised on Carson's hesitancy to assert the unfastened ball, giving the Buddies much more of a mountain to climb.
The problem began to seem like mounting Everest when Liverpool loanee Clarkson slammed emphatically into the highest left nook from exterior the field simply earlier than the half-time whistle blew.
The Buddies returned wanting to make sure the scoreline did not turn out to be a complete embarrassment, with Ryan Flynn changing Fundamental and the guests' reverting to a again 5 as soon as once more.
Carson got here to the rescue early on within the second half, denying Miovski his hat-trick with a effective low save earlier than Richard Tait cleared the hazard.
In a uncommon foray ahead, Kiltie did properly in the midst of the park earlier than releasing Keanu Baccus. The Aussie midfielder fired large of the left submit, with keeper Kelle Roos nonetheless untroubled within the Dons web to that time.
That was quickly to alter when Kiltie was clumsily barged over within the field by Hayes. Ayunga held his nerve to drill previous Roos, who did get a hand on the strike however not sufficient to divert it over the bar.
The penalty provided a glimmer of hope to the Buddies, with Carson once more the guests' saviour as he once more denied Miovski earlier than pulling off an exquisite one-handed cease to disclaim Besuijen's fierce effort.
Robinson threw warning to the wind within the final quarter of an hour, with strikers Eamonn Brophy and Alex Greive climbing off the bench to switch Ayunga and Baccus.
Brophy flashed a shot over the bar after being teed up by Joe Shaughnessy because the Saints appeared to make it fascinating within the closing phases.
However ultimately Aberdeen substitute Luis Lopes beat the offside entice earlier than calmly chipping Carson to seal the victory.