Regarding the patentability of recipes, at the USPTO inventor's conference last September, one of the snippets mentioned in one of the breakout sessions I went to was about a major cookie company (might have been Archway -- they seem to turn up frequently on Google when I look for "patent cookies molasses") losing its attempt to get a patent on the use of molasses as a softening ingredient in cookies. The examiner turned up a recipe from about a hundred years ago which noted that by using molasses in a cookie recipe, the cookies remained soft long after baking.
IIRC, the presenter pointed this case out to highlight the proper use of trade secrets -- the point being that the company's competitors probably wouldn't have figured out that the company's soft cookies were staying soft because of the molasses in the recipe, since it would be difficult to analyze what was preventing hardening -- but that since patent applications were public after 18 months, the company publicized the (little-known) "secret", thereby blowing their competitive advantage.
One of my hobbies is cooking, and there are a lot of small details in preparation or ingredient selection which cause major differences in the final product. Use of copper bowls for beating fluffy meringues, butter vs. margarine resulting in different crispiness of cookies, and so on ad infinitum.
If someone is teaching, or is publishing recipes, I don't really understand why that someone would want to get a patent on the process or recipe -- that would seem to defeat the purpose of instruction. If producing finished consumer foods, I can see the point -- but given that experimentation in cooking techniques is such a thoroughly mined subject area, unless you've really hit on something unique, there are hundreds of years of cookbooks that can be used against you as prior art.