Brown Ideye was the hero with two goals, and whilst Saido Berahino and James Morrison also found the back of the net, it was Nigerian international Ideye who stole the headlines.
The summer signing from Dynamo Kiev arrived with high expectations having broken the club's record transfer fee, but struggled to make an impact early on.
Yet now, the 26-year-old has hit four goals in his last three games, and is striking up a promising partnership in the Baggies attack alongside Saido Berahino.
His two goals against West Ham on Saturday helped Tony Pulis' men move into the next round of the FA Cup, and the plaudits are now pouring in for Ideye - just weeks after he almost left The Hawthorns.
Ideye has gone from zero to hero in the West Midlands, and has told the Daily Mail that ex-Arsenal striker Nwankwo Kanu is giving him advice on how to succeed in English football.
"In Nigeria, Kanu is one of the big players who everybody looks up to, so I am happy that we talk," said Ideye. "He calls me sometimes and I get advice from him because he played here, too. He tells me to keep working hard and things will turn out to be good for me. That’s what happened on Saturday," he added.
After his spell with the Gunners, Kanu went on to play for West Brom, but found the net just nine times in 58 games for the Baggies in a poor stint.
At 38, Kanu has bags of experience that he can pass on to Ideye - and given his recent performances, it seems to be working.