Haaland set the Blues on the way with a first-half penalty that was scant reward for the dominance showed.
The Norwegian headed home his second just after half-time following a flowing City move before he set up Phil Foden for a late third.
It was no more than the Treble winners deserved after what was a stunning 90 minutes against our cross-city rivals.
The game followed an emotional tribute to Sir Bobby Charlton, with Mike Summerbee and Tony Book representing City – as well as Brian Kidd who played for both – warmly welcomed onto the pitch before a minute’s applause echoed around Old Trafford.
Watch the extended highlights above...