CARLSBAD, California, March 24, 2013 (AFP) - The 25-year-old Recari, who started playing golf at age 11, earned her only previous LPGA Tour title at the 2010 CVS LPGA Challenge.
"It was hard down the stretch," Recari said. "I had a birdie on 16, then after that this (18th) green was tough.
"I really, really have to thank my family and my coach. It's really special to get my second win."
Both players made bogey on the final hole of regulation Sunday to set the stage for the playoff which was equally mistake-prone.
South Korea's Kim shot a closing one-under 71 while Recari finished regulation with a two-over 74 at the Aviara Golf Club. They both finished at nine-under-par 279.
The pair returned to the 18th tee for the playoff and each landed in the short grass off the tee. Recari pulled her second shot into the chipping section left of the green. Then Kim did the same.
Recari hammered her third shot seven feet past the cup and Kim left her birdie effort nine feet shy. Kim missed the putt to the left, leaving Recari with a chance to win. But Recari missed her par chance well right of the hole.
They both tapped in for bogey and returned to the 18th tee for a second chance at a winner-take-all hole. Kim and Recari both found the fairway off the tee again.
Recari's second shot almost sailed into the water right of the green, but stopped on the fringe.
Kim's approach stopped over 30 feet short of the flag. Kim missed her birdie putt left of the hole.
Recari then poured in her birdie from off the green for her third international victory.
"I'm not close to calm right not. It's the opposite," Recari said. "Every victory is different. This is just amazing, I can't believe it. I'm just really happy."
Earlier in the week, Recari made her 38th straight LPGA Tour cut.
She was one of just three players last year to make the cut in each of her starts.
She competed four years on the European Tour from 2006-09, winning the Finnair Masters.
Pornanong Phatlum bogeyed 18 to miss the playoff by one. Phatlum shot a closing four-under 68 to end at minus-eight. She tied with Cristie Kerr (71) and Mo Martin (69).
Aussie Karrie Webb (74), Jane Park (71) and Lizette Salas (72) shared sixth place at seven-under-par 281.
Leading final-round scores on Sunday in the LPGA Kia Classic (x-won in a playoff, USA unless noted):
279 - x-Beatriz Recari (ESP) 69-67-69-74, I.K. Kim (KOR) 71-67-70-71
280 - Phatlum Pornanong (THA) 75-68-69-68, Mo Martin 69-71-71-69, Cristie Kerr 70-68-71-71
281 - Jane Park 66-72-72-71, Lizette Salas 69-70-70-72, Karrie Webb (AUS) 67-70-70-74
282 - Giulia Sergas (ITA) 68-74-72-68, Haeji Kang (KOR) 69-69-76-68, Azahara Munoz (ESP) 72-70-69-71, Stacy Lewis 70-70-69-73
283 - Ha-Neul Kim (KOR) 73-72-68-70, Na Yeon Choi (KOR) 72-71-68-72, Suzann Pettersen (NOR) 71-71-69-72
284 - Jodi Ewart Shadoff (ENG) 69-74-72-69
285 - Jacqui Concolino 70-72-71-72, Chella Choi (KOR) 71-70-71-73, Inbee Park 69-69-72-75, Paula Creamer 69-68-71-77