The loanee netted during a closed-door friendly against West Brom.
Hatem Ben Arfa has made a goalscoring start to life at Hull City.
Gaston Ramirez, another Deadline-Day signing by manager Steve Bruce, scored Hull's other goal as they earned a 2-2 draw.
But it is the form of Ben Arfa that will be the subject of intrigue - both from Hull and Newcastle supporters. Should the Frenchman impress Bruce with his performances, he could be in line to start for the Tigers sooner rather than later.
For the Magpies, though, it might be a case of missing out on a much-needed creative spark that could have brought them goal after goal.
Newcastle boss Alan Pardew is already under huge pressure at St James' Park and an in-form Ben Arfa producing the goods at another club would reduce his popularity on Tyneside even further.
The 27-year-old was not allowed to leave the Magpies on loan because of an inability to score goals, however, rather his tendency not to track back and concentrate solely on beating his man all by himself.
But, at a time when goals are Newcastle's biggest concern, it will come as no thrill to supporters to know Ben Arfa might be netting regularly at the KC Stadium.
It was only a closed-door friendly, of course, and Magpies fans will hope that's where it ends for now.
Before being allowed to leave St James' Park, the Frenchman scored another fine goal - for Newcastle's reserves against Reading. If he makes a habit of doing that on the Premier League stage, Pardew will have even more explaining to do.