Beth Schafer scooped the award for her two songs Still Small Voice and Love Multiplies and wins a prize that includes cash as well as recording equipment.
The American Idol Underground is an online extension to the popular TV series which features Simon Cowell and Jewish pop star Paula Abdul.
The two songs come from Schafer latest CD The Quest & the Question which was released last December.
"My songs combine the rich tradition of interpreting Jewish sacred texts with the high production values of contemporary Christian music. The themes are universal which appeal to Jewish and Christian fans alike," said Schafer.
"I hope to build bridges throughout the interfaith community with my music and emphasize that we all have more in common than not."
Schafer is a regular performer in the Jewish music world touring across the world as well as being the cantorial leader of Temple Shir Shalom of Oviedo in Florida.
Reprinted with permission of Daily Jews