The England striker scored with a breathtaking 30-yard free-kick to fire United into the quarter-finals of the Carabao Cup.
The technique was certainly reminiscent of former United frontman Ronaldo as the ball looped over the Chelsea wall and dipped under Willy Caballero's crossbar.
Team-mate Victor Lindelof tweeted that he was "sure I've seen that somewhere before" while manager Ole Gunnar Solskjaer admitted: "It was a Cristiano-like goal."
Rashford had earlier given United the lead from the penalty spot, before Chelsea equalised through Michy Batshuayi.
"The boy has got nerves of steel. Takes a penalty, no problem. Steps up and hits the ball like he does and wins us the game, fantastic," Solskjaer added on MUTV.
"Marcus has that strike in him. I've seen him in training so many times and it's got to be hitting the target soon, you think, because he's had a few efforts. Finally it goes in."
A 2-1 defeat brought an end to Chelsea's seven-match winning streak, but even Blues boss Frank Lampard had to admire Rashford's winner.
"It's great technique," said Lampard. "It was a stunning strike from him, at a time when I felt we were really in the ascendancy.
"We've had seven wins on the trot, with some taxing games in the Champions League. Our form in the league has been really good, and it's clear they are our priorities.
"I saw a lot of positive things. I hate losing but it's clear there is a bigger picture."