The Red Rose were particularly prominent in the first half - heading into the break 12-3 to the good - before Paul O'Connell hit back for Ireland early in the second half.
However Owen Farrell, who appeared seven times in the Lions tour of Australia in 2013, made sure of victory with two late penalties and Youngs believes England are right on track ahead of their World Cup opener against Fiji a week on Friday.
"That was an experienced Irish side and that was a hard test, which was exactly what we wanted," said the hooker.
"It was nice to go out there and go for it and not only did we win, but we left some things out there too, which means we have things we can work on.
"We also left the breakdown alone a bit and attacked it at the right time. We were too eager against France.
"Controlled fury was what we spoke about all week. We wanted to get the Twickenham crowd behind us and we went out there from the first whistle and did that."
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