I stumbled upon "Williams smoking bags for fish" at Wal Mart in the toilet paper section. I thought they looked interesting but wasn't cooking fish, then found "Williams smoking bags for poultry" wedged in on their side in the paper plates. I grew up on Williams chili seasoning so tried the poultry one.
They are $2.15 each and imported from Finland.
They are a double-walled foil bag with something granular in between the walls. There is a "this side down" side. You put in whatever, seasoned as you choose, close the bag and put it in a 450 degree oven and it smokes it. No smoke in the kitchen, no clean up.
My first effort was bone-on chicken breasts and asparagus from the garden. Tonight I tried more chicken and three ears of corn, adding the chicken after half an hour.
I found that it took about twice as long to cook than the table of cooking times for various ingredients indicated, but it was very good - no fake liquid smoke-like flavor. The asaparagus was great, I didn't put it in for very long. The corn took an hour and a half and was still crisp with a very delicate smokiness. The chicken was moist and tender and flavorful. The leftovers from the first try made excellent smoked chicken salad!
I'm curious to know if anybody else has tried these.