Cockfosters beat Stotfold 2-1 to lift the Spartan South Midlands Challenge Trophy final on Monday.
In a close game, it was Cockfosters who had the best of the opening proceedings, Stuart Blackburne heading an Adem Ali cross straight at the Stotfold goalkeeper early on.
Stotfold's best chance came when their number ten headed across the upright from close-range.
Cockfosters hit the woodwork themselves shortly before half time when Jack Cook's pass found Ali, who struck the near post.
Five minutes after the re-start Cockfosters took the lead.
The goal came Dennis Maharajan drove through the midfield with the referee giving advantage for a foul just outside the penalty area, allowing Maharajan to pick out Ali who was fouled inside the area to earn a penalty.
Blackburne converted the penalty to put Cockfosters ahead.
Phil Kane nearly doubled Cockfosters' lead when he hit the post immediately after, before Stotfold's number four headed home in the 54th minute.
Neither side could find a winner in regular time, meaning extra time was required to seperate the two.
Despite having to play 29 games since March 8, it was Cockfosters who had the legs to find a winner in extra time.
Blackburne picked the ball up down the right-hand side and found Bilal Butt who played a one-two with Blackburne before firing underneath the Stotfold keeper to win the cup.
Next up is the last league game of the season against Holmer Green before Stotfold visit Chalk Lane for the last game of the season which is the South Midlands Floodlight Cup Final.