Danny Morris got a brace with Greg Pearson, Elliot Ward, Mitchell Cole and Phil Lumsden all scoring.
Greg Pearson set the Hammers on their way in the second minute, then Danny Morris added a second before Fulham pulled one back through Aaron Nowacki.
But West Ham scored twice 60 seconds through Elliot Ward and Phil Lumsden and, with Mitchell Cole making it a high five Danny Morris completed, as they say all too rarely at Upton Park, the rout.
Curiously, the Cottagers made a double substitution just two minutes before half time.
It didn't work.
TEAM: George Sealey, Tommy Laws, Brent Tattum, Anton Ferdinand, Elliot Ward [Blewitt 81], Phil Lumsden, Marce Collington, Graeme Carrick [Noble 72], Danny Morris, Greg Pearson [Bunce 69], Mitchell Cole.
FULHAM: William McFrederick, Oliver Wheatley-O'Neill, Robert Milsom, Aaron Nowacki, Robert Watkins, Daniel Stratford, Matthew Collins, Darren Pratley, Jamel Carr, Michael Timlin, Sean Doherty.