Nahki Wells scored a hat-trick as Burnley beat 10-man Colchester United 4-0 in Group D at Curzon Ashton.
After Eoin McKeown missed an early chance for the visitors, Wells scored his first goal for Burnley when he diverted Mark Howarth's effort into the roof of the net.
He made it 2-0 from close range on 35 minutes.
Tinashe Chakwana volleyed in the third before Wells completed his hat-trick with a penalty, after he had been fouled by William Wright, who was sent off.
Wells is set to travel with the first team to Southampton for Saturday's Premier League match.
Burnley top the group with six points.
Burnley: 4 Dec v Swansea (A) PL Cup
Colchester: 4 Dec v Newcastle (H) PL Cup