According to the Daily Telegraph, 71-year-old Delia insisted she would not return to the small screen, because today's cookery shows are more about entertainment than education.
At a Birmingham trade show yesterday, Smith said: "This is the end when it comes to Delia on telly. When I started, there was further education in the BBC. Now you have to entertain.
"You have someone telling me I haven't got time to show this, or I haven't got time to show that."
She added: "I am afraid to say this is the end when it comes to Delia on the telly."
Delia, who first appeared on our screens in 1970 and has enjoyed a TV career spanning more than 40 years, revealed that she turned down an offer from the Beeb after being dropped as the face of Waitrose, a position that Heston Blumenthal retains.
However, it won't be the last we see of the iconic cook - the veteran also announced that she would be launching Delia Online Cookery School later this month, an online step-by-step guide to cooking and baking.
Delia remains the UK's number one cookery author, with more than 21 million of her recipe books sold to date.
What do you think? Will you miss Delia on TV? Leave your comments below...