From Wikipedia:
I Love to Eat was a NBC TV series which aired from 1946 to 1947. It was a cooking show hosted by chef and cookbook author James Beard. When the show started, each episode was 15 minutes long, but this was later changed to 30 minutes. Little else is known about this series.
No footage from the show remains. However, an audio recording of one episode survives. As documented in the Library of Congress archives, the audio recordings of episodes from I Love to Eat (as recorded from live TV broadcasts over WNBT-TV in NY in 1946-47) include a 1947 episode featuring ski report and ski luncheon discussions by James Beard.
This is followed by prolonged live commercials from Borden including Elsie the Cow as show sponsor, where James Beard recounts his dream about the Borden cow as part of the show. This 1946 - 1947 show hosted by Beard is believed to be the first network cooking show. (Some cooking demonstration programs had preceded it on local TV pre-war broadcasts of 1939 - 1941.)