Mary Valastro Pinto is the mother of Buddy Valastro and his four older sisters. She was a regular on the show until she retired in 2010, but still occasionally appears on the show. It was announced in 2012 that she has been diagnosed with ALS, a disease that weakens your muscles. The family's struggle and reaction was documented in the Season 5 episode, "A Bittersweet Homecoming", on July 23, 2012. In order to help their mom and others who may be dealing with ALS, Buddy and his sisters started the "Momma Mary Foundation."

She's remarried to a man named Sergio, who Buddy and his sisters love, although Mary still loves her first husband, Buddy Valastro I. In an early episode (before she was diagnosed with ALS), Mary once told her son, "You may be the Cake Boss, but I'm the Boss Boss!"

Mary Valastro died on june 22, 2017.