Lens had a prime opportunity to open the scoring just six minutes in, as a penalty was awarded after Elye Wahi was fouled by Danilo Pereira in the area. However, Przemysław Frankowski sent his effort straight down the middle, and Gianluigi Donnarumma stood his ground to save.
Barcola subsequently opened the scoring on the half-hour mark, as PSG countered in brilliant fashion, Mbappe played a superb ball into the young midfielder, and he finished coolly from an angle. And on the stroke of half-time, Jonathan Gradit brought down Barcola when the last man, and was sent off for denying a clear goalscoring opportunity.
Lens mounted a spirited fight-back in the second half but were unable to carve out the chances needed to level proceedings, while PSG fluffed a number of increasingly gilt-edged chances before Mbappe added a second with a superb finish from a tight angle.
They have subsequently moved eight points clear at the top of the table, thanks in no small part to their superstar forward.