Josh Andrews earned and emphatically stuck away a 30th-minute penalty that ultimately proved the difference between the teams.
Blues Under-23s last match was in the first week of March, a 2-0 win at Hull City - then Coronavirus took hold and it has been a long wait ever since to get back into the swing of things.
Remeao Hutton was on duty again following his loan to Yeovil Town last season, while both Nico Gordon and Ryan Burke - who made their senior debuts when football resumed after lockdown - started in defence as well.
Second-year scholar Remi Walker was paired alongside the typically impressive Ryan Stirk in the deep-lying midfield roles and put in a vibrant performance.
Blues in the main were always in control of the fixture, that was played out over three 30 minute periods.
Burke went close to opening the scoring before Andrews struck, a punted left-footer just bouncing wide of the post.
Andrews, fed by Burke on the left of the area, was upended in the box and the obvious outcome was the award of a penalty.
Andrews stepped up and slammed it firmly past the 'keeper, low to the right.
Before the first raft of substitutions were made by Blues in the 45th minute, Jack Concannon had a shot blocked and the goalbound attempt looped up into the grateful 'keeper's arms.
Tate Campbell, Kane Thompson-Sommers, Miguel Fernandez, Mitch Roberts, Marcel Oakley and Alfie Chang came on; Hutton moved inside to centre-half due to Joe Redmond's withdrawal.
Blues took a little while to get into their stride again and trialist goalkeeper Tom Scott (whose trial actually originally began days before lockdown) got in a good position to thwart an Albion striker, who forced his way in behind.
Just before the end of the second third, Blues almost capped off an excellent spell of composed possession with another goal: Thompson-Sommers turned on the edge of the D and let rip, his rising drive tipped away at full length.
The most notable incident thereafter before the final whilst went saw Burke nip onto a loose ball to create an angle in the area and hit a fierce shot that the crouching 'keeper parried.
Blues: Scott, Hutton, Burke (Oakley 45), Redmond (Roberts 45), Gordon (Redmond 74), Stirk (Burke 74), Walker (Chang 45), Sun (Fernandez 45), Concannon (Campbell 45), Hurst (Thompson-Sommers 45), Andrews (Concannon 74). Not used: Brooks, Bellingham, Scanlon.