Collins, 25, knocked out Jennifer "Transformer" Adams in the opening minute of the Jan. 26 bout, which was held in Branson, Missouri.
Collins effortlessly tossed her opponent to the mat seconds after the opening bell, and delivered a furious flurry of punches to earn the ref stoppage.
The video of Collins' fight against Adams is available for viewing on YouTube.
With the victory, Collins stretched her amateur record to 4-3, including back-to-back victories over top-notch opponents.
Collins defeated Hannah Eagle at Branson's ShoFight 24 in Dec. 2012, snapping a two-fight losing skid.
Collins' win over Adams was her first victory of the new year. No word yet on when she'll be fighting next, or who her next opponent will be.
Other winners on the Jan. 26 Brawl Inc. card include Chris Levine, Mario Reynaga and Jesse Moore.
Collins, known by Missouri MMA fans as "Red Dragon," is one of the fastest-riding bantamweights in the world, as she holds victories over Ashley Wake and Krystal Jordan.
MMA fans can check her out via Twitter @katecollins24, or at her official Facebook fan page. Collins is officially sponsored by Babes of MMA, as she's one of the sexiest redhead MMA fighters on the planet.