vs. Waterson on April 5, 2013. This was her promotional debut. She won the back-and-forth fight via split decision. The bout was named Fight of the Night. Ultimate Fighting Championship On February 25, 2013, Kaufman signed with the Ultimate Fighting Championship along with four other women. She was expected to make her promotional debut against Sara McMann at UFC Fight Night 27 on August 28, 2013. However, McMann withdrew from the bout for undisclosed personal reasons. As a result, Kaufman was pulled from the event as well. Kaufman faced fellow UFC newcomer Jessica Eye at UFC 166 on October 19, 2013. She lost the fight via controversial split decision. However, in February 2014, the Texas Department of Licensing and Regulation changed the result to "no decision" with no reason given for the change. It was later revealed that Eye had failed her post-fight drug test for marijuana. Kaufman was expected to face Shayna Baszler at The Ultimate Fighter Nations Finale. However, it was announced on April 1, 2014 that Baszler pulled out due to injury. Kaufman was then scheduled to face Amanda Nunes, but Nunes withdrew as well. Kaufman eventually faced former opponent Leslie Smith on the card. She won the fight via unanimous decision. After over a year away from the sport, Kaufman returned to face Alexis Davis for a third time on April 25, 2015 at UFC 186. Despite seemingly winning the first round due to her dominant striking, Kaufman lost the fight in the second round via submission. Kaufman was scheduled to face Germaine de Randamie at UFC on Fox: dos Anjos vs. Cowboy 2. However, De Randamie pulled out of the fight on December 3 citing an injury. Kaufman instead faced Valentina Shevchenko. She lost the fight via split decision. Kaufman became a free agent after the UFC did not resign her to a new contract after the loss to Valentina Shevchenko. Invicta Fighting Championships It was announced on December 6, 2017 that Kaufman was signed by Invicta Fighting Championships. Kaufman faced Pannie Kianzad on January 13, 2018 at Invicta FC 27. At weight-ins, Kianzad weighted 136.7 Ibs, missing 1.7 Ibs of the upper limit of bantamweight of 135 Ibs and the bout proceeded at catchweight. Kianzad was fined twenty five percent of her purse for falling make weight. Kaufman won the fight via unanimous decision. Kaufman faced German bantamweight Katharina Lehner at Invicta FC 29