The 17-year-old midfielder opened the scoring on 32 minutes, before netting his second with a superb strike two minutes later.
Lewis Mansell's header on 51 minutes made it 3-0, before Wright saw his penalty saved and Jack Doyle scored on the rebound.
Scott Wharton headed in Rovers' fifth on 61 minutes and substitute Dan Butterworth came on to make it 6-0.
Michael Folivi added a late consolation for the visitors. Blackburn are top of Group B with four points.
See: Blackburn report
Blackburn: 20 Nov v Aston Villa (A) PL2
Watford: 4 Dec v Cardiff (H) PL Cup