I love being able to challenge it with "and now make it vegan" etc to see what it comes up with.
This is also another example of the thing where having a randomly unreliable teacher is actually quite useful if you're trying to learn to cook - because it forces you to question what it tells you, apply your own intuition and think carefully about what worked and what didn't.
But the more esoteric you go, aiming for something really novel or something unusually historic/traditional/regional, or the more technical and delicate, the more it'll turn to hallucinating naive text continuations that will lead you astray. An experienced cook will know to spot the weird stuff and revise on the fly; an inexperienced one is going to end up with some... odd dishes.
It's the same as many of us see when used for code assistance. It's great at inventing "original" boilerplate which inspiration has been exhaustively covered in source material, but gets real wacky and unreliable the more you move away from that.
When I've looked at gpt recipes they've had some pretty deranged proportions and you'd be in trouble following them precisely. If you just need a list of ingredients and a loose technique though eg "tofu & cashew stir fry with soy sauce and garlic" then ya sure I mean absolutely.