It was Antonsson's fifth goal in his last five games in league and cup competition.
Antonsson now has eight goals this season for Blackburn in 18 games.
It was important for the striker that he rediscovers his confidence, and there is even an outside chance he could get into contention for Sweden's World Cup squad.
He was the top scorer in Sweden's Allsvenkan in 2016 before he earned a move to Leeds United that summer.
He started brightly for the Whites but was then largely ignored by Garry Monk between September of last year until the rest of the season, sent to play with the under-23s.
In the summer he looked bereft of belief in pre-season, but is now re-discovering his goalscoring touch.
If his future does not lie at Leeds, Blackburn would surely love the opportunity to sign him permanently.