Two goals in three minutes in the second half, from wing-backs Harry Boyes and Femi Seriki, sealed the points for United’s youngsters away at Cardiff, despite Sam Graham being sent off after the break.
Zak Brunt registered two more assists, which will intensify calls for him to be handed a chance in the Premier League at the expense of John Lundstram when United travel to Wolves this weekend.
Elsewhere, here’s what else is going off at Bramall Lane…
Beerschot fail to lend Blades a helping hand
Both Ismaila Coilibaly and George Broadbent missed Beerschot’s defeat by Oostende at the weekend through injury; a result which could have implications for Sheffield United’s search for a new permanent manager.
Kenny recalls Seaman's "freak" semi-final save, on this day in 2003
Paddy Kenny was still thinking about Sheffield United’s FA Cup semi-final defeat to Arsenal a few days earlier when he pulled into the Bramall Lane car park and received a phone call from an unknown caller who said he was David Seaman.
“Yeah, good one,” Kenny laughed, and hung up.
The caller, it turned out, was the former England goalkeeper, and not one of Kenny’s pals on a wind-up. He called back and apologised, and Seaman took it in good spirits. And, it turned out, he had a favour to ask of Kenny.
Why Manchester United know all about Blades youngster Kyron Gordon
Although it will have come as a surprise to some that Manchester United are among those clubs reportedly monitoring Kyron Gordon’s situation at Sheffield United, officials tasked with running Old Trafford’s youth programme have long been aware of the youngster’s potential.
World-record holder, a coach and still playing at 39 - What happened to Sheffield United's players from their FA Cup semi-final against Hull City, on this day in 2014?
The result didn’t go their way, but it is still a day that lives long in the memory of every Sheffield United fan who was there to witness it.
April 13, 2014 and an FA Cup semi-final classic, which finished 5-3 to Hull – and resulted in a spontaneous round of applause from the Blades fans who were rightly proud of their side’s efforts that day under the Wembley arch.
But what happened to United’s players from that day?
How Sheffield United will attempt to ward off interest in youngster Iliman Ndiaye
Sheffield United could choose to reward Iliman Ndiaye with a new contract following his recent progress, despite still being without a permanent manager following Chris Wilder’s departure last month.
John Egan reveals Sheffield United demand with seven games left in Premier League season
John Egan, the Sheffield United defender, says his side must try and put their previous results this season to their back of their minds as they look to build some confidence to take into next season in their seven remaining Premier League games.
Ethan Ampadu says Sheffield United loan spell has made him a better player - but he's not focused on Chelsea future
Ethan Ampadu has declined to be drawn on his long-term future as his season-long loan at Sheffield United draws to a close, despite admitting that he wants to play senior football wherever his future takes him – and that his spell at Bramall Lane has made him a better player.