Chelsea cruised to victory at Turf Moor without Eden Hazard.
Ross Barkley, Ruben Loftus-Cheek and Alvaro Morata scored again and there was also a goal for Willian.
Morata’s opener midway through the first half – his third goal in his last four Chelsea appearances – put them ahead.
Barkley and Willian netted early in the second half, and Loftus-Cheek scored in injury time to complete a resounding victory which moved the Blues – still unbeaten under boss Maurizio Sarri – back up to second in the Premier League table.
Morata was teed up by Barkley’s lovely touch and calmly steered his shot beyond Joe Hart from 10 yards out.
Barkley’s goal, scored 12 minutes into the second period, was a beauty.
The England midfielder strode forward with options to his left and right, opted to shoot – and drilled home a glorious left-footed strike from near the edge of the penalty area.
Willian’s was a lovely strike too. The Brazilian cut in from the left and curled a right-footed shot beyond Hart.
And Loftus-Cheek, who scored a Europa League hat-trick on Thursday, bundled the ball in from the resulting corner after Hart had pushed Olivier-Giroud’s shot onto the top of the bar.
Chelsea barely missed Hazard, who was sidelined by a back problem.