Ireland stuck to the task and eventually the flood-gates opened with Tommy Bowe scoring twice and both Tom Court and Andrew Trimble crossing late on, adding to Earls' earlier try.
Jonathan Sexton delivered a 17-point haul with the boot and Earls believes the determined triumph has got the adrenalin pumping ahead weekend's re-arranged trip to Paris, where the men in green bid to halt France's winning start.
"We're happy. That was a big scoreline for us against Italy," Earls told the Irish Independent.
"After the Welsh game we wanted to go out and prove ourselves.
"Not much was said at half-time. We knew it was going to take 60-odd minutes to break Italy down.
"We got in some good positions in the field in the first half but their defence was good and there were a couple of mistakes from ourselves.
"We knew we had to be direct in the second half, which we did and the scores came from that.
"The second half was a lot better and we got our second wind and some good scores. The back line clicked so it was good.
"There were a lot of bruised bodies at the end because it was so physical, but we're happy.
"It's a good note on which to be going to the Stade de France next week."