I use flax oil (I work in a chemical analysis equipment training lab).
Instead of a chemist's reason, read this lady's:
http://sherylcanter.com/wordpress/2010/01/a-science-based-technique-for-seasoning-cast-iron/
Thanks for posting this, Bill! Very informative and jives with other cast-iron related nerdery I have been reading up on lately.
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Buried in the comments of the above blog post is a link to
Cooking for Engineers. I haven't dug around it at all yet, but I suspect there will be more science-based cooking-related information to nerd-out on.
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Like (I'm guessing) many ExPo folks, I was first introduced to cast iron cooking in the 'Scouts as a kid making camp meals - especially dutch oven cobbler. I didn't start using cast iron at home until a few years ago when I bought a 10" lodge skillet to make a corn bread recipe. It turned out amazingly well, and shortly thereafter I started experimenting with using my skillet for other things. Much like a college romance, experimenting led to a handful of absolute disasters, some phenomenal successes and discoveries, and resulted in a long-term relationship. :chef:
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I've been building my collection over the past several years and now have 10-15 pieces (I think; I've honestly lost count) - most of which get used regularly. The only time I consistently cook with non-cast iron now is when making pasta, soup, boxed mac 'n cheese for the kids, etc...
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My favorites, which get used several times a week, are a
10" skillet, a cast iron pizza pan, and
a reversible griddle/grill. I use the skillet for just about anything, the pizza pan in the same way you'd use a baking stone or cookie sheet, and the griddle/grill for everything from eggs & pancakes for breakfast to steaks when I don't feel like grilling outside. Haven't had issues with sticking since I first got 'em. I'm also a huge fan of the
Lodge enameled Panini pan and
matching press. Both work exceedingly well, look handsome when left on the range top, and clean up well after gooey messes that result from the requisite amount of cheese to make a good Panini. A
6 quart (camp) dutch oven comes with and does all of the heavy lifting when camping, as well as the aforementioned 10" skillet.
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The "difficult" care and feeding of cast iron is greatly exaggerated by people who can't be bothered to educate themselves and take a little time to learn how to do it right, or lazy people who would rather replace a cheap Teflon pan every year or two, rather than invest a little love into some good cast iron which will last several lifetimes.