The teenager took no hesitation in sliding his shot past Stefan Ortega in our FA Cup final victory at Wembley, as we beat Pep Guardiola's side 2-1 in our final outing of the season.
Kobbie has enjoyed superb season on an individual note, as he also topped the charts to win our Player of the Month prize for May, too.
Much has been made of the pass from Bruno Fernandes to pick him out in the build up, as our no.37 finished off a well-worked team goal during the 39th minute of action.
Claiming a whopping 57 per cent of the vote, Mainoo more than edged out his competition as voted for by you, the Manchester United fan base.