Albion claimed the derby spoils at Aston Villa as they celebrated a 2-0 victory courtesy of two goals in the space of four first-half minutes.
Fit-again Hal Robson-Kanu sent a looping header over Lovre Kalinic in the 41st minute before Jay Rodriguez added a quickfire second off a post from long range, his 17th goal of the season, to settle an enthralling encounter at Villa Park.
It sent the 2,167 Baggies fans present, as well as the 2,500 watching on big screens back at The Hawthorns, into raptures.
It was Albion's first trip across the midlands to face their neighbours since securing all three points in 2015, ensuring back-to-back away triumphs at Villa.