For long spells the home side dominated, and finally made the breakthrough with seven minutes left when Dane Nicklas Bendtner powered in a header before Brazilian teenager Denilson smashed in a 20-yard effort to seal victory.
It was a composed display against a near full-strength Newcastle side, and once which left their manager more than impressed.
"It was a good game at good pace, slowly we took over and in the second half it was all us," said Wenger. "We were good and intelligent, and I like that.
"The game was of the same level we played recently with the players who did not feature tonight, and with a style of play with a continuity.
"We have wave after wave of generation of young players.
"We work with them and when they have come in, they show top quality.
"We have a small group of good quality, and very young.
"For me, all of them can play on a regular basis in the first team."