Town were well beaten at Stamford Bridge as Chelsea dominated from start to finish to book a visit to Everton in the fourth round of the FA Cup.
First-half goals from Solomon Kalou, Daniel Sturridge and a Carlos Edwards own goal put Carlo Ancelotti's side in total command at the break and Chelsea added a fourth straight after the restart when Nicolas Anelka beat Marton Fulop superbly.
Sturridge grabbed a fifth with an equally classy finish a minute later before Frank Lampard took centre stage with a double late on.
Fulop saved superbly to deny Gael Kakuta an eighth, Stamford Bridge not the Town 'keeper's favourite ground - he conceded seven on his last appearance in west London - for Sunderland last season.
Colin Healy made his first start since August, replacing the suspended Grant Leadbitter with Darren O'Dea and Jaime Peters also included in the starting line-up.
Chelsea, as expected dominated from the first whistle and the game was only five minutes old when Fulop had to save from Anelka, Sturridge then blasting wide from six yards.
Gareth McAuley blocked a shot from Lampard, the England international then testing Fulop from the edge of the box while at the other end Petr Cech kept Connor Wickham at bay at his near post after a break involving Jason Scotland and David Norris.
Troy Brown did brilliantly to clear Anelka's shot off the line when the Frenchman seemed certain to score on 20 minutes. Josh McEachran was denied by Wickham's challenge as Chelsea turned up the heat on the Town goal and the breakthrough finally came just past the half hour, Anelka cutting through the Blues' defence and although Fulop half blocked his shot, the ball was about to cross the line before Kalou made sure.
Chelsea extended their lead a minute later, Kalou the provider this time with a cross from the right and Sturridge flicked the ball into the net.
Anelka shot wide, then Lampard couldn't keep his strike down while at the other end, Scotland warmed Cech's hands with a left foot strike.
Norris picked up a yellow card for a rash challenge on John Terry four minutes before the break and from the free-kick, Chelsea wrapped up their place in the fourth round, Lampard's free-kick skimming off Edwards' head and beating Fulop into the far corner.
Chelsea added a fourth three minutes into the second-half, Anelka had already been denied by Fulop before beating the Hungary international superbly with a shot across goal into the far corner.
Ronan Murray replaced Scotland before the restart but the teenager had hardly got into the game before Blues were five down, Sturridge beating Fulop with another quality finish.
Anelka fired into the sidenetting before Chelsea made a first change with Kakuta on for Kalou after 55 minutes.
Jaime Peters blasted just wide in a rare Town attack in front of a fantastic and vocal Blue Army following of more than 3000.
Tamas Priskin replaced Wickham just past the hour, Murray then letting fly from 30 yards to test Cech.
Van Aanholt limped off as Jeffrey Bruma became Chelsea's second substitution on 70 minutes, McAuley - Town's stand out performer - showing calmness in the box soon after to clear the danger from Anelka.
Chelsea made it six 12 minutes from time, Lampard smashing the ball past Fulop from the edge of the box and the midfielder made it seven a minute later, sliding the ball into the net from close range from Branislav Ivanovic's cross.
Fulop saved well from Kakuta in the last minute as Town's FA Cup run ended in disappointing fashion at the home of the holders with a Club record defeat in the competition. And it's Arsenal next!
Chelsea: Cech, Bosingwa, Ivanovic, Terry, Van Aanholt (Bruma 70), Ramires, Lampard, McEachran, Kalou (Kakuta 55), Sturridge, Anelka. Subs not used: Hilario, Essien, Drogba, Malouda, Ferreira.
Town: Fulop, Brown, McAuley, O'Dea, Kennedy, Peters, Norris, Healy, Edwards, Wickham (Priskin 63), Scotland (Murray 49). Subs not used: Lee-Barrett, Delaney, Smith, Eastman, Civelli. Booked: Norris.