Mbappe scored both his goals at the Velodrome from Lionel Messi assists and in between he set up the Argentine for PSG's other goal as they moved eight points clear at the top of the table.
It was a result and a performance that will erase many of the doubts about a team that had been in stuttering form in recent weeks as they outclassed their most credible domestic challengers.
Mbappe's brace took him to a double century of goals for PSG in just short of 250 appearances since signing from Monaco in 2017.
The 24-year-old therefore equals his former teammate Edinson Cavani as the club's record marksman. "He is obviously fast but it's not just about his legs -- the speed at which he does things is out of the ordinary," PSG coach Christophe Galtier told broadcaster Amazon Prime. "Players like him are clearly motivated by stats and records.