Martha Stewart's Mother Dies

Saturday November 17, 2007 12:35 PM EST

Martha Stewart

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Martha Stewart's mother, Martha Kostyra – who was known as Big Martha – has died at age 93.

Kostyra, who died on Friday, often appeared with her daughter on television offering expert cooking instruction. Martha Stewart called her "my favorite guest" and said she led an "amazing life."

"I am very sad to tell you that my mom passed away," Martha Stewart, 66, wrote on her blog Saturday, posting video clips of them together. "Here's a tribute to Martha Kostyra – Big Martha."