After the recess, Ramalepe intercepted a loose ball before firing from the edge of the box to break the deadlock in the 64th minute before Darya Stezhko doubled the lead one minute later.
Minsk were further reduced to nine players when Natalia Asmykovich was sent off in the 75th minute as Anastasia Linnik extended Dinamo to a three-goal lead a minute later.
Four minutes from full-time, Stezhko bagged her second of the match and the fourth to wrap the big triumph at the Minsk Stadium.
South Africa s Ramalepe was in action for the duration, along with Ivorian Cisse, while Mulaudzi featured in the final six minutes and Cameroon s Dabda saw 84 minutes of the contest for Dinamo.
Antonio Cincotta s side made a fine start to the contest, caging the Bianconere in the opening stages until Arianna Caruso set up Barbara Bonansea for Juve s opener five minutes from the half-time break.
Some 10 minutes after the restart, Bonansea doubled the lead for Juventus when she netted from the right corner, for her brace of the day.
Fiorentina, however, fought to come back into the tie thanks to attempts from Kim, Tatiana Bonetti and Valery Vigilucci but they could not beat in-form goalkeeper Laura Giuliani.
The result saw Kim and Fiorentina miss the chance to celebrate their first silverware this season at the expense of Juventus.
Diretta Juventus Fiorentina Supercoppa Donne streaming e tv zazoom.it - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from zazoom.it Daily Mail and Mail on Sunday newspapers.
Supercoppa Donne, Juve-Fiorentina 2-0 nove.firenze.it - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nove.firenze.it Daily Mail and Mail on Sunday newspapers.
Having both finished in the top four last term, runners-up Fiorentina were drawn against third-place Milan in the semi-final encounter.
After her Uefa Women s Champions League debut in the 1-0 Round of 32, second leg win at Slavia Praha, Kim earned a place in the starting XI of Fiorentina, just as Jane was a starter for Antonio Cincotta s side.
At Aldo Gastaldi Stadium, Milan well when Valentina Giacinti opened the scoring after just seven minutes to claim a narrow first-half lead over last season s runners-up.
After the break, the home side staged a fightback and gained their deserved equaliser through Kim 11 minutes into the second half.