After a goalless first half, Newcastle upped the tempo in the second 45 minutes with Joe Willock, Sean Longstaff and Bruno Guimaraes getting on the scoresheet.
The match saw non-competitive United debuts for summer signings Nick Pope and Sven Botman with the latter coming off the bench at half-time. Bruno Guimaraes and Chris Wood were also given their first run-outs in pre-season as the played the final half hour.
A total of 22 players were involved in the match with head coach Eddie Howe making 11 substitutions in total.
Matty Longstaff and Jay Turner-Cooke remained on the bench while Karl Darlow, Mark Gillespie, Matt Ritchie, Jamal Lewis, Federico Fernandez and Kelland Watts missed out.