I'm soliciting methods from people who have successfully cooked
onion rings, personally, 10+ times.
My biggest problem is that the batter or crumbing slides off the
rings as soon as I put it into the oil, partially - I suspect -
because the raw sliced rings have a very thin Teflon-coated
membrane between the circles that usually can't be removed unless
the onion rings are allowed to slightly dehydrate. And even then
it's hit or miss.
I like battered rings, like a medium tempura or beer battered
fish-n-chip. But I'm willing to try a bound breading as it might
help the taste/texture.
I've tried the flour-egg-seasoned flour toss, with the
buttermilk/milk bath beforehand, with and without baking soda in
the batter or flour. I've tried red onions, yellow onions, and
white onions(*). I've tried the tempura batter I usually use for
fish which turns out great on fish and clams, but not on rings.
I've even tried fercockatah Shake 'n Bake, both baking and
frying. Nothing seems to work consistently.
The times that I do get picture-perfect fried O-rings, they're
not tasty at all - no onion flavor at all, bad texture, and often
greasy (due to the splitting/sliding of the coating).
Somebody must have a method that has eluded my 30+ efforts.
(*) Whole green onions (half white, half green parts) turn out
great when I fry them Japanese tempura style with fish, but green
onions I find too bitter and pungent when served whole like that.
-sw (Skeptical and Wondering)