The Anfield club scored three goals in 13 minutes, with Luis Suarez getting two and Daniel Agger the other, and were in control beyond that.
They were hardly tested by a Rangers side in big trouble at the bottom and Gerrard admitted his men had been on the money.
"I wouldn't say it was easy, that would be disrespectful to QPR, they are having a tough time," he told Sky Sports 1.
"If we started well we knew we could quieten the crowd and that was the best we've played this season in the first half.
"The plan was for us to get more goals, but Harry Redknapp is a top manager and QPR changed things in the second half so credit to them."
Suarez's goals added further to the brilliant season he has had and Gerrard added of the Uruguayan: "He's been brilliant ever since he came here. He's a magician.
"These clubs have to play him twice a season but we have to play against him every day!"
Coach Colin Pascoe took the Liverpool side in the absence of the ill Brendan Rodgers and he agreed with Gerrard's assessment of Suarez.
"He's a maverick, he's brilliant, I can't speak highly enough of him. He's a true gentleman," he said.
"But all of the lads were magnificent. The chances we created were phenomenal. We could have had a couple more. Some of our play was exciting to watch and I'm sure our fans will be happy tonight.
"It was fantastic to watch, the way the lads passed the ball around and the weight of our chances."