Almost 50,000 tickets have been sold for the Wednesday 11 May (19:30 BST) match, in which United will compete for the trophy with Nottingham Forest.
Cochrane, who joined United last summer, also outlined why this match will be a wonderful opportunity for the U18s to ‘stake a claim’ in the club’s future ahead of the arrival of new first team manager Erik ten Hag.
“I’m so proud of the players and the staff,” Cochrane said.
“The players have been fantastic since pre-season. They’ve been committed to developing, learning and improving day in and day out and it’s resulted in them ending up in an FA Youth Cup final, which is fantastic.