West Brom scored two outstanding goals on their way to beating English Football League newcomers Harrogate Town to advance to the third round of the Carabao Cup.
The Baggies made 10 changes to the side that started Sunday's 3-0 home defeat by Leicester on their Premier League return, and gave debuts to three players.
England youth midfielder Rekeem Harper fired Slaven Bilic's side ahead with a clever shot on the turn before Wales forward Hal Robson-Kanu doubled the lead from 25 yards.
Keeper David Button, making his first West Brom appearance since signing from Brighton, denied Aaron Martin with a one-handed save before substitute Callum Robinson's tap-in made it 3-0.
The Baggies will host Southampton or Brentford, who play later on Wednesday, in the third round.