Martha Stewart's Mother Dies
11/17/2007 AT 12:35 PM EST
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."