The England midfielder converted a superb team effort, before Aaron Ramsey and a double from German playmaker Mesut Ozil sealed an emphatic win for Arsene Wenger's menArsenal extended its lead at the top of the Premier League with a 4-1 win against Norwich City on Saturday.
The Gunners went into the game knowing that a win would see them open up a two-point lead over Liverpool at the top of the table and they did not waste their opportunity, producing a superb performance to claim the win.
Jack Wilshere and Mesut Ozil put Arsenal in control before Jonny Howson pulled one back for the visitors.
However, Arsene Wenger's men were not to be denied as an Aaron Ramsey strike and a second from Ozil sealed victory.
German playmaker Ozil was included in the starting XI for Arsenal after recovering from a knee problem suffered on international duty, while Norwich was without striker Ricky van Wolfswinkel because of a toe injury.
After 18 minutes the deadlock was broken in magnificent fashion, as Wilshere tapped home to finish off a wonderful move involving Cazorla, Wilshere and Olivier Giroud, whose improvised flick-on from the edge of the area sent the England international through on goal.
The hosts suffered a blow eight minutes before halftime as Mathieu Flamini was replaced by Ramsey following an earlier collision with Alexander Tettey.
Arsenal's grip on the game looked to be in danger in the closing stages of the first half, with Robert Snodgrass and Leroy Fer both drawing strong saves from Wojciech Szczesny.
Norwich continued to press forward after the interval as Snodgrass and Martin Olsson tested Szczesny with long-range drives.
But the visitors' hopes of taking something from the game were severely dented when Ozil put Arsenal in control just before the hour mark.
Giroud was again the creator, his perfectly-placed cross finding Ozil, who rounded off a superb counterattack with a fine header into the bottom corner.
Chris Hughton's men did not lack ambition, though, and they found a way back into the game when Howson drilled home a powerful low effort from 18 yards after he capitalized on poor defensive work from Per Mertesacker.
Substitute Nicklas Bendtner then went close as Arsenal looked to finally kill the game off and victory was confirmed when Ramsey wrapped things up with an excellent goal.
The Wales international showed great agility to net his fifth Premier League goal of the season, slamming the ball past Ruddy from inside the six-yard box after weaving his way past two Norwich defenders.
Arsenal did not stop at three, though, and put the gloss on a fine win with two minutes left when Ozil finished off another excellent move involving Tomas Rosicky and Ramsey.