Xerxes, Pittsburgh Festival Opera
"As Atalanta, Bonnie Frauenthal was a comic, flirtatious presence who also plumed [sic] her character’s depths in a love aria for (you guessed it) Arsamene."
"Bonnie Frauenthal, as Romilda’s sister Atalanta, sang the role’s music quite impressively, and acted the part with a charming sense of comic innocence. She, too, was an audience favorite."
— Pittsburgh in the Round
Carmen, Opera Breve
*"Frauenthal was equally impressive as Michaëla with her rich middle voice and bright high notes. Her passionate rendition of the famous “Je dis” riveted rather than bored the audience (which happens far too often in “Carmen” productions). She brought a wide-eyed innocence and verve to the role, fleshing out the sometimes two-dimensional peasant girl."
La Traviata, Dell'Arte Opera Ensemble
"Soprano Bonnie Frauenthal made a strong impression as Violetta, singing with accuracy and conveying with her appealing voice the heroine’s mood changes, from the party scene at the beginning to the death scene in the last act."
— The Epoch Times
— The Epoch Times
"The Violetta viewed on August 25 was soprano Bonnie Frauenthal, and she proved exemplary in the demanding role – a natural actress with a supple-voiced lyric sound, well-handled coloratura and a warm middle register."— My Scena
"Frauenthal sang and acted her complex role compellingly: she is a confident singer, capable of both womanly sturdiness and subtle virtuosity, and she inhabited the dense narrative of Violetta’s story credibly and compellingly. ... Both Frauenthal and Heredia sang with integrity; they held nothing back from full commitment to either their roles or their audience."— TheaterScene
"In the role of Violetta Valéry, Bonnie Frauenthal tackled the character’s taxing demands of charisma, grace, and vocal acrobatics with admirable promise." — ParterreBox
Hotel Casablanca, Opera Breve
"The cast's vocal talent is stellar, particularly from Frauenthal, who gives such a lyrical and emotional performance of the comedy's romantic aria."
— Time Record News