The Reds dominated from the off and particularly in the first half, when an own goal from Toffees defender Danielle Turner and Martha Thomas’s smart finish settled the tie.
It was United’s second win within the space of four days and was enough to secure a spot in the competition’s quarter-finals – although whether that’s as Group B winners or the best second-placed team is yet to be decided, after Manchester City’s game with Leicester was postponed.
“I’m really pleased,” Marc said after the final whistle.
“I thought we were excellent first half, really sharp, really aggressive.