A recent New York Times report alleged that Paltrow and celebrity chef Rachael Ray were among numerous celebrities who did not actually write their cookbooks.
Paltrow first responded to the article on Twitter by suggesting that The New York Times' "facts need checking".
The Avengers star also joined The Rachael Ray Show via Skype to once again deny that she employed a ghost writer for My Father's Daughter.
"You know normally I don't respond to gossip or anything, but you know this is my professional life and I'm writing more cookbooks," Paltrow said.
She continued: "I feel like it's important for the people who have responded so positively and interacted with me about my book, that they know that this is my book and I wrote my book and it's all mine."
Rachael Ray echoed Paltrow's sentiments by insisting that she writes her best-selling cookbooks as well.
"This is how I spend the little time at home I have with my family, I spend in front of these little notebooks, in front of the computer," the host explained.
Ray continued: "It sort of takes away from all of that to not be able to call that writing, of course that's writing. It doesn't mean you don't value the people who write the glossary or that help organise the pantry or that work on a project, but a writer is still a writer."
Paltrow's appearance on The Rachael Ray Show airs Friday (March 23).
Earlier this week, Paltrow that she still wears her late father Bruce Paltrow's wedding ring because it makes her feel "safe".
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