Elliot Embleton opened the scoring for Alex Neil’s side in the 12th minute with a long-range strike which was too powerful for goalkeeper David Stockdale.
During a tense second half, Sunderland goalkeeper Anothey Patterson also made some important interventions - most notably to deny striker Sam Vokes.
Ross Stewart then doubled his side’s lead ten minutes from time after he was set up by Alex Pritchard.
Our chief SAFC writer Phil Smith has delivered his verdict on how each Black Cats player fared at Wembley:
Ross Stewart then doubled his side’s lead ten minutes from time after he was set up by Alex Pritchard.