Nugent came off the bench and took his two goals like Didier Drogba rather than a striker who had not scored since February.
The striker is trying to rebuild his career on loan at Turf Moor after managing only four goals in 45 games during a dreadful two-year spell at Portsmouth.
And the omens are good after a towering 67th-minute header was followed by a terrific shot on the turn as Burnley maintained their perfect home record against a Sunderland side that 'petered away', according to deflated manager Steve Bruce
High-riser: Nugent beats Michael Turner to Tyrone Mears' cross to give Burnley the lead
Burnley v Sunderland: The action as it happenedAlas, poor Lorik - Cana has gone from Kosovo refugee to a Sunderland heroBurnley snub will always haunt me, says Sunderland boss BruceBURNLEY FC