The Reds were in complete control at the break in M16 against the visitors from League One after first-half goals from Marcus Rashford, Antony from the penalty spot and Alejandro Garnacho.
Garnacho, Rashford and Christian Eriksen's double added to the tally in the second period as Erik ten Hag enjoyed his biggest win as United boss to date and the Reds continued in comfort on the path to Wembley.
FIRST HALF - THREE GOALS PUT REDS IN CONTROL
Ahead of our first cup game of the campaign, Ten Hag made it clear he would be taking the tie seriously and that he viewed the Carabao Cup - the first trophy he won as United manager in 2022/23 - as an important competition.