The Black Cats were dealt a first-half blow when striker Ellis Simms limped off the pitch with an injury.
Yet two goals from Patrick Roberts in quick succession before the break put the visitors in a commanding position.
Jack Clarke then added a third in the 69th minute as Sunderland recorded their joint biggest win of the season.
Our Sunderland writer Phil Smith has dished out his player ratings from the Select Car Leasing Stadium:
13. Amad Diallo (sub) - 7
Got into some really good areas and caused problems. 7 Photo: Frank Reid
14. Jay Matete (sub) - 7
Got about the pitch and broke up the play when required. 7 Photo: FRANK REID PHOTOGRAPHER 2022
15. Jewison Bennette (sub) - 7
Almost produced a debut goal and showed his blistering pace. An exciting talent. 7 Photo: SAFC
4 / 4