And the centre, who was called up and started for the Lions this summer against both the Brumbies and the Melbourne Rebels, showed no signs of ring rust as Sarries racked up three tries inside the first half an hour.
And the South African born centre revealed his delight after the result with the Six Nations just around the corner.
"I am delighted. It is fantastic to be back," Barritt said.
"I am very grateful to the Saracens strength and conditioning department and physio department for working tirelessly to get me back and have me in good shape to hit the ground running.
"I was fortunate enough to go in (to the England camp) for a couple of days during the autumn. I popped in every Monday to keep in touch and chat about a few things. I have been well connected."
And Saracens rugby director Mark McCall acclaimed 27-year-old Barritt's display against Gloucester, which came following a run-out off the bench at Worcester the previous weekend.
"For Brad to produce that level of performance having had 30 minutes of rugby since September is quite something. I thought he was outstanding," McCall said.
"He was brilliant. He passed the ball really well, too, and the combination with Marcelo Bosch in midfield was really good."