Mosta came from a goal down to beat Birkirkara 2-1 and win the Super Cup at the Luxol Ground on Monday.
A stunning lob from Eleonora Agliano gave champions Birkirkara the lead on 25 minutes but Dorianne Theuma equalised for Mosta from a free-kick eight minutes from the end of the first half.
After the change of ends, both teams created some scoring chances but it was Mosta who struck the winner on 56 minutes.
Rebecca Chircop's delivery from a corner was headed back by Yanika Fenech towards Rebecca D'Agostino whose shot hit the underside of the bar on its way into the net.
Victory in the Super Cup, the curtain-raiser to the season, augurs well for Mosta who are expected to produce a strong challenge for the league title.