Rampant League One Leeds crushed stuttering Championship side Crystal Palace at Elland Road to reach the third round of the Carling Cup.
Leeds took the lead with their first real attack when Jermaine Beckford flicked on a long ball for Jonathan Douglas to lob over Darryl Flahavan.
Neil Kilkenny then crossed for Beckford to head home and, soon after half-time, Luciano Becchio nodded past Flahavan.
The Argentinian was replaced by Enoch Showunmi who curled home the fourth.
Leeds manager Gary McAllister
"I'm asking people to step up to the plate and when they get their chance to go and take it. I've got to say that from one to 11 tonight they all performed.
"It shows that we have a very strong squad of players here and competition brings out the quality in people.
"I thought Luciano Becchio led the line fantastically, and that some of the combinations in the middle of the park and some of the movement in the final third was excellent.
Crystal Palace manager Neil Warnock:
"Quite honestly we couldn't cope with the front lads. Once the second goal went in it was disappointing to say the least.
"If you defend like that you're going to get beat against any level of opposition and I thought the two centre forwards bullied our defenders from start to finish.
"I'm not used to coming to Leeds and losing. I usually enjoy coming here and putting one over on them but they thoroughly deserved it."
Leeds: Lucas, Richardson, Michalik, Telfer, White (Johnson 73), Hughes, Douglas, Delph, Kilkenny, Beckford (Howson 78), Becchio (Showunmi 57).
Subs Not Used: Martin, Marques, Robinson, Snodgrass.
Goals: Douglas 11, Beckford 32, Becchio 52, Showunmi 76.
Crystal Palace: Flahavan, Ertl, Lawrence, McCarthy, Hill, Soares, Watson (Fletcher 88), Carle (Hills 63), Djilali, Andrew, Moses (Ifill 66).
Subs Not Used: Speroni, Thomas, Oster, Griffit.
Att: 10,765
Ref: Kevin Friend (Leicestershire).
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