The Blues fired home eight goals as they won this toe 8-1 against the Tykes.
Jude Soonsup-Bell netted a first-half hat-trick before adding an outrageous fourth after the restart, while goals from Tino Livramento, Ben Elliott, Harvey Vale and Lewis Bate secured passage for Ed Brand's boys in some style.
The seven-goal winning margin matches our biggest in Youth Cup history, while it is the first time we've scored eight or more since 1997.
With a place in the next round secured, the Blues will now wait for the draw to discover their next opponents.
Soonsup-Bell became the first player to score four for Chelsea in a Youth Cup game since Roger Bill in September 1961.