The Canaries, knocked out of the Capital One Cup by Aston Villa here in midweek, made it five successive home league victories to continue their remarkable run of 10 Premier League matches unbeaten.
However, Hoolahan, who has agreed an extension to stay at the Norfolk club until 2015, arrived on cue after 64 minutes to head past Ali Al Habsi.
"Fortunately for us Wes has signed a new deal and he has earned it, and not just for this season," said Hughton.
"He was excellent today and to see Wes get a headed goal was worth the entrance fee alone. Wes capped off a really good all-round team performance."