Leinster flanker Dan Leavy scored the first of three first-half tries for the three-time European champions on Saturday when he latched onto a superb crossfield kick from Ross Byrne.
With Leinster pressing deep into the Munster half, scrum-half Jamison Gibson-Park skipped multiple forward runners before firing the ball to Byrne who composed himself before picking out an unmarked Leavy with a beautifully timed crosskick.
It was the first of three first-half tries for the visitors with Robbie Henshaw finishing off a brilliantly worked team try later in the half, while James Lowe also won the visitors a penalty try after he was taken out by Andrew Conway just metres short of the line.
Brilliant try! @DanLeafy94 takes the cross-field kick to give @leinsterrugby the lead against @Munsterrugby 🏉
Catch all the action now on @TG4TV and @SkySports to make sure you don’t miss a thing! 📺#GUINNESSPRO14#MUNvLEI pic.twitter.com/qCFUQvGbWY
— BKT United Rugby Championship (URC) (@URCOfficial) December 26, 2017
Unbelievable from @henshawrob to round off a Christmas cracker for @leinsterrugby – can @Munsterrugby fight back from here? 🏉
Catch all the action now on @TG4TV and @SkySports to make sure you don’t miss a thing! 📺#GUINNESSPRO14#MUNvLEI pic.twitter.com/amDxYRk7nm
— BKT United Rugby Championship (URC) (@URCOfficial) December 26, 2017
Munster did get on the board through Conor Murray, who touched down after forcing his way over the tryline from the base of the ruck, but at the time of writing, the hosts find themselves in a 22-point hole with 14-men after Conway was sin binned for taking out Lowe.