The 25-year-old Denmark international was recalled to the Gunners' starting XI against Hull on Wednesday night to give leading forward Olivier Giroud a rest - and headed the hosts in front inside two minutes.
It was Bendtner's first goal for Arsenal since March 2011, following when he had several unsuccessful loan spells and hit the headlines with his off-field behaviour last month following a Police caution for causing damage to an apartment building where he lives.
Arsenal went on to win the match 2-0 and stay four points clear of Chelsea as Arsene Wenger's men continued to lay down a marker for a long overdue sustained assault on the Premier League crown.
Wenger feels Bendtner, who was close to leaving in the summer, has the attributes to produce consistent performances if he is fully focused, and the 6ft 3in forward intends to do just that as Arsenal get set for a testing run of fixtures.
"It was a fantastic feeling, I think my celebration for the goal was a show of that," Bendtner told Arsenal Player.
"It was my first Premier League game this season, so I am pleased to have scored and that we won.
"It has been difficult for the players who have not been in the team because we have had such good form and the players who have played have been magnificent.
"With the way people play now, it looks like whoever comes in takes it in his stride and goes with it, that showed again because there were a couple of changes and everybody played well."
There is little respite ahead for Arsenal who host Everton on Sunday, then travel to Napoli for their final Champions League group match before a crunch clash at Manchester City on Saturday lunchtime.
Bendtner said: "We are very much looking forward to it because we know this is a very hard period coming up and we need everybody to be focused and sharp, but we will take just one game at a time and try to put the points on the table."