The New South Wales Breakers are back on top of the Australian women's cricket scene once again after trouncing Queensland by nine wickets to claim their 18th Women's National Cricket League.

The Breakers have been to all 21 finals since the tournament's inception and lost just three times — to Victoria in 2003 and 2005, and to South Australia in 2016 — but order was restored on Saturday.

After finishing second behind the Fire on the table, the Breakers labelled themselves the underdogs for this year's decider, but looked every bit a dominant force as they jogged to an easy victory after dismissing the Fire for just 119 at Brisbane's Allan Border Field.

In response, wicketkeeper Alyssa Healy (56 not out) and Blackwell (36 not out) led the Breakers home, reaching the total inside 24 overs for just the loss of opener Haynes, but the end was not without confusion.

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Healy belted Delissa Kimmince for the game's first six and both teams came together to shake hands before being told the scores were only tied.

But Healy resettled herself to face the next ball and delivered an almost identical stroke, smashing a four back over the bowler's head to make the win official.

Earlier in the day, Rene Farrell (3-20 off seven overs), Lauren Smith (2-6 off 5.1 overs) and Maisy Gibson (2-14 off nine overs) were the heroes for the first fully professional women's team in Australian domestic sport.

Meanwhile, gun all-rounder Ellyse Perry struggled with the ball, taking no wickets and leaking 36 runs from her seven overs.

The day started as well as possible for the Breakers with Queensland opener Beth Mooney edging the perpetually probing Farrell to Nicola Carey in the slips off the first ball of the innings.

Jess Jonassen and Kirby Short added 27 quick runs before Farrell claimed the scalp of Southern Stars slogger Jonassen in the fifth over and Short fell victim to an excellent run out by Rachael Haynes, on her knees at backward point.

Another Southern Star, Grace Harris, fell later in the ninth over, bringing Jemma Barsby together with Kimmince and the pair attempted a rebuild.

They added 53 runs in a watchful 15 overs before Kimmince was bowled by leg spinner Gibson and Barsby was caught brilliantly at mid-on by Breakers skipper Alex Blackwell.

It started a collapse of 5-16 as the Fire were extinguished in a flash.