Scholes smashed a free-kick wide before there was a glimpse of the future when Tom Cleverley and Welbeck showed their quality to tee up Mame Biram Diouf for a full-blooded drive to make it 5-0. The Senegalese striker then marauded through unchallenged to add a sixth with his second of the night.
Scholes made way for promising youngster Paul Pogba following the goal and Cosmos at least managed to stem the tide until the final whistle with Calderone saving well from Cleverley (twice) and Anderson. The crowd enjoyed saluting their heroes and booing Patrick Vieira but the most affection was, rightly, reserved for the eponymous hero of the Paul Scholes testimonial.
He got his goal, delivered some classic long-ranges passes that drew gasps from the audience and even lunged in for a couple of tackles and enjoyed a mock flare-up with old pal Butt. United move on to City in a couple of days' time and the fact all Reds fans are still coming to terms with is that their midfield idol will no longer be available for selection.
United: De Gea (Lindegaard 45), Rafael (Evans 45), Evra (Fabio 45), Ferdinand (Smalling 45), Vidic (Jones 45); Nani (Cleverley 62), Scholes (Pogba 74), Giggs (Anderson 45), Young (Diouf 62); Berbatov (Welbeck 45), Rooney (Macheda 62).