Known for her occasional appearances on Cake Boss, she is the daughter of Mauro and Maddalena Castano.
In 2010, she made her reality television debut in an episode of Cake Boss, "Castles, Cannolis & Cartoon Characters."
She is known on Twitter by the handle dominiquecasta3.
She is one of three siblings and has appeared with her brother, Buddy, and sister, Mary, on Cake Boss.
Her uncle is Cake Boss lead chef Buddy Valastro.