Henri Lansbury and Brian Montenegro were on target as the Development Squad scored a convincing 2-1 victory at Queens Park Rangers on Tuesday.
Captain-for-the-day Lansbury belted in a fantastic long-range volley before substitute Montenegro pounced on a loose clearance to net the winner after DJ Campbell had equalised.
With Guy Demel, Winston Reid, Papa Bouba Diop, Paul McCallum and Montenegro returning from injury and Stephen Henderson looking solid on his first start in goal, Ian Hendon's side were too good for an experienced Rangers team.
Young professionals Sebastian Lletget and Eoin Wearen caught the eye, while scholars Kenzer Lee, Blair Turgott, Pelly Ruddock and Frazer Shaw showed why they are all rated so highly.
QPR named France international Djibril Cisse, top scorer Heidar Helguson, Tommy Smith, Fitz Hall, Danny Shittu and Campbell in a strong starting XI, but they had no answer to Hendon's team. Even when they did find a way through in the second half, Henderson made a pair of smart saves to keep Rangers at bay.
Hendon told West Ham TV he was proud of his players after an impressive afternoon's work at the Harlington Training Ground.
"QPR are a Premier League side and they had a few first-team players out, like we did, and it was a good competitive game and we came out on top," said the coach.
"It could have been a lot more comprehensive. We played ever so well and created a lot of chances and on another day it could have been a few more.
"They have not really opened us up that much and we came out with a win."
Lansbury's goal was an absolute pearler, with the England Under-21 star smashing a bouncing ball into the top right-hand corner from all of 30 yards.
Nicky Maynard, Sam Baldock and John Carew all started up front, with all three coming close to getting their names on the scoresheet. With Lletget outstanding in central midfield, Montenegro went one better by slamming in the winner 12 minutes after replacing Carew at half-time.
Hendon was pleased with every single member of his squad, many of whom will want to force their way into Sam Allardyce's first-team reckoning over the coming weeks.
"Guy, Winston and Papa all came through fine and that was the plan. Henri got 90 minutes under his belt and Sam and Nicky also got some game time, which was pleasing.
"Our young lads also did extremely well. Eoin and Sebby have been in my group for the majority of the season and have been unsung players. Eoin is now comfortable at centre-back after moving midway through the season and is starting to shine through.
"Sebby has got the ability there - we know that. He's got to keep producing performances like he did here and the manager will take notice of him. He's done every so well to link play in the midfield.
"Brian has been out with an ankle injury and he's come back and scored, which he has a habit of doing."
West Ham United XI: Henderson, Demel (Shaw 61), Reid (K.Lee 61), Wearen, Potts, Diop (Ruddock 61), Lansbury, Lletget, Maynard (Turgott 61), Baldock (McCallum 71), Carew (Montenegro 46)