The in-form forward was involved in the second goal at Wembley, with his close-range effort deflecting off the boot of Newcastle defender Sven Botman.
Rashford has registered 16 goals in 19 appearances since returning from the World Cup and has netted 24 times in all competitions for United this season - his recent double against Leicester City made this the best scoring campaign of his career so far.
Speaking to Sky Sports after the final, Rashford hopes that United's first taste of silverware under Erik ten Hag will inspire a search for more.
“It's massive for us to be involved in these types of games, something that we've missed as a club,” said Rashford.