Mateusz Musialowski scored another two goals as Liverpool set up an FA Youth Cup showdown against Chelsea by dismantling Burnley.
Musialowski, who grabbed a hat-trick in the last round, netted in either half as Melkamu Fraudendorf and Oakley Cannonier also struck in a comfortable 4-1 triumph at the Academy in Kirkby on Tuesday evening.
Marc Bridge-Wilkinson's side will now host Chelsea in the fifth round, with the tie having to be played by February 5.
The Reds were without teenage winger Kaide Gordon, who was instead with the first team preparing for Thursday's Carabao Cup semi-final second leg at Arsenal.
READ MORE: Michael Edwards has repeated one of his best Liverpool transfer deals
READ MORE: Rafa Benitez signing tells Liverpool to swap Naby Keita for Premier League star
But they were nevertheless far too strong for a Burnley side they had beaten 5-0 in the U18 Premier League North before Christmas.
Liverpool enjoyed the perfect start when they scored twice inside the opening 11 minutes.
In the third minute, a forceful run down the left from Bobby Clark saw him progress into the area before he went to ground under the weight of a challenge.
As the Reds man appealed for a penalty, Frauendorf made the matter moot by pouncing on the loose ball and slotting into the bottom corner.
Then an undercooked goal kick from Burnley goalkeeper Sam Waller only reached as far as Musialowski on the halfway line. the Pole controlling the ball on his chest before racing forward unchallenged and thumping into the far corner.
Michael Mellon - son of Tranmere Rovers boss Mickey - should have pulled a goal back moments later but smashed over with a shot on the turn when unmarked inside the area.
Stefan Bajcetic fired wide, Musialowski tested Waller from range and Oakley Cannonier headed against the bar from Clark's left-wing cross as Liverpool dominated the remainder of the half.
Cannonier prompted a brilliant save from Waller shortly after the break but got his goal on 53 minutes, netting in off the post after good work by Fraudenorf down the left.
Burnley winger Sean Etaluku scored almost instantly in response at the far post, but Musialowski grabbed his second on 58 minutes when his right-foot shot from the edge of the area was deflected in.
Liverpool U18s are next in action on Saturday when they travel to Middlesbrough in the U18 Premier League North (kick-off 1pm).
LIVERPOOL U18s (4-2-3-1): Davies; Mabaya, Miles, Chambers, Scanlon; Bajcetic, Balagizi; Frauendorf, Musialowski, Clark (McConnell 84), Cannonier. Subs: Hewitson,, Pilling, Lucky, Davidson, Figueroa.
