Darren Moore watched his Albion side hit Queens Park Rangers for seven and then insisted there was room for improvement.
Rangers old-boy Matt Phillips opened the scoring before the visitors pulled a goal back through Joel Lynch.
But Albion went goal crazy after the break scoring six times with Kieran Gibbs putting Albion ahead before Jay Rodriguez scored from the spot.
Dwight Gayle then capped an excellence performance with his first for the club before Rodriguez again netted from the sport.
Phillips scored his second in injury time with Hal Robson-Kanu scoring his second in as many league games with virtually the last kick of the game.
Moore said: “The boys were ruthless today and showed a real cutting edge, when the chances came along we were able to put it in the back of the net.
“Once you get to 3-1 the game becomes that bit easier and people settle down.
“It turned out to be a complete performance. That said, even though the scoreline was what it was we know we still have work to do.
“There’s things we can get better at and things we will get better at but based on today we are very, very pleased."