The three players who made senior debuts in the Carling Cup a week ago were all on duty, and two of them - Paul Pogba and Larnell Cole - were on the scoresheet. Meanwhile, Ezekiel Fryers started at centre-back alongside Michael Keane, brother of Will who killed off the Canaries after an own goal.
Any concerns that the long trek might lead to a sluggish start for Warren Joyce's young side were dispelled in the third minute when Pogba profited from a mistake by City defender Simon Lappin to put United 1-0 up.
The advantage only lasted until the quarter-hour mark when Norwich's Matt Ball beat Ben Amos with a diving header from Sam Kelly's cross. But while the home side dominated for much of the first period with the score locked at 1-1 and Amos was forced into a good save from Chris Martin, it was United's superior cutting edge that separated the sides again six minutes before the break.
A wonderful link-up between Pogba and Will Keane paved the way for the former to shoot straight at goalkeeper Declan Rudd, and when United won the ball back as it rebounded into play, Adam Drury beat Keane to it to prod into his own net for 2-1. It could have been 3-1 at half-time but Keane's bid to round Rudd from Pogba's threaded pass was thwarted when the keeper got a hand to the ball.
The Reds did put daylight between themselves and Norwich early in the second half when Larnell Cole, seven days after his senior debut at Leeds, drilled a left-footed shot across the keeper after being played in by Pogba. Will Keane also played his part in the third goal, before scoring