It depends on what you're trying to do. To get the most skill I would almost suggest reading the book versus cooking a lot of recipes. If you're trying to supermax cooking as well as max it, then I suggest horse granola, cheese plate or autumn salad since you need to do it 75 times to get the third skill challenge.
Also take into effect whether or not this person is a natural cook, genius, has fast learner LTR and/or is a vampire.
Supermax on this forum means to max the skill as well as get all of the related skill challenges within the skill journal.