Kate Aitken started a series of homemaking programs on the CBC in 1948. The Kate Aitken show, sponsored by Ogilvie Flour Mills, was broadcast across Canada Mondays, Wednesdays and Fridays at 10:30 a.m. (EDT). The program's mandate was to report on women's fashions, stretching household dollars, current events, and the arts. One edition of the program featured "Mrs. A's" cure for the common cold, a discussion on a Toronto couple running a day care, a Canadian meal sent to a British women's group, and Aitken's trip to Berlin. In a show a month later, Aitken gave tips on crossing the border, selling candy, whether cheques signed in pencil are valid, and what size of eggs are the best buy. The program was broadcast from Montreal, where Aitken also worked as the women's editor for the Montreal Standard. The CBC Radio guide referred to Aitken as "a Canadian housewife who isn't average." Besides maintaining a household and her newspaper and radio jobs, Aitken was also a food consultant, a lecturer, and women's director of the Canadian National Exhibition. At the request of the British Food Ministry, Aitken travelled to England in 1945 to work on a survey about food conditions after the Second World War. In 1949, while commenting on her many duties, Aitken said: "The fuller my life is, the happier; and the more I do, the more I am able to do." That year, she also took an around-the-world trip to report on the status of women and children abroad.

Before her radio career, Aitken explained that looking after a house and two kids didn't keep her busy enough. So she bought a farm, planted an orchard, and started a poultry and canning business, employing 13 women.

Aitken retired in 1959. Two years later she was appointed to the CBC's board of directors. She died on Dec. 11, 1971 in a Mississauga, Ontario hospital, where she was recovering from a broken hip suffered a year earlier.