Anderson was born in Colorado Springs, Colorado and attended Thomas B. Doherty High School in Colorado Springs.
A 2006 graduate of Brigham Young University, Anderson appeared in 120 games and averaged 10.7 ppg and 5.3 rpg during her career with the Cougars. As a senior in 2006, Ambrosia led Brigham Young University in both scoring (187 ppg) and rebounding (74 rpg) in 2005-2006. In the Mountain West Conference, Anderson ranked second in scoring average and third in rebounding.
She was also seventh in the conference in three-point percentage (364) and fourth in defensive rebounds per game (547).
She also became one of only 18 players in Brigham Young University women's basketball history to score more than 1,000 point points. The Detroit Shock drafted Anderson from Brigham Young University with the 17th pick in the second round of the 2006 Women's National Basketball Association draft.
She was then traded to the Minnesota Lynx for Jacqueline Batteast. On May 9, she was waived by Minnesota and immediately picked up by the Connecticut Sun.
She appeared in one game for the Sun before being waived on June 29.
Anderson signed as free agent for the New York Liberty on July 2, 2006. During the 2007-2008 season, Anderson played in Europe for the Siemens team in Greece and was on the All Star team During the 2008-2009 season, Anderson played in Europe for the Portugal championship team, Olivais Coimbra.
Ambrosia was Portugal player of the year, Forward of the year, Import Player of the year, and First Team player.
During 2009-2010, Ambrosia played for the Israel championship team, A. South. Ramat Hasharon Electra. Anderson was named Forward of the year, First Team Player and Import Team player.
During 2010-2011, Ambrosia played for Maccabi Ashdod, who lost the finals to Elitzur Ramla. Ambrosia played for H.R LeZion, Israel, and Elitzer Netanya, Israel in 2011-2012.
In 2012-2013 Ambrosia moved to Kara Trutnov, Czechoslovakian Republic where she was named league Most Valuable Player, First Team and All-Imports Team.
She finished the league with an 18.4 scoring average. In 2013-2014, Ambrosia played for Flammes Carolo, France, She finished the season ranked on the Second team and the All-imports team Her points average was 14.4.
Ambrosia is returning to the Flammes team for the 2014-2015 season.