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Haybox

Old German hayboxAs part of  my continued obsession with lower-energy cooking, I decided to try to make a haybox to cook my chicken carcass down into stock Sunday.  Someone (Heather?) had emailed me in response to my Dutch oven post, telling me that you can bring a pot of incipient soup to a boil, wrap it in towels, and leave it alone for the afternoon.  The cast iron and towels will hold in the heat, and the soup will cook itself.

While researching rocket stoves, I stumbled across a mention of hayboxes, which seem to work on a very similar principle to Heather's idea.  You fill up a box with hay (or other insulation), put in your boiling pot, and leave it alone for several hours.  I've seen figures suggesting that using a haybox with long-cooking recipes like chicken stock will save 80% of the energy you would use to simmer the stock on the stove.  You should leave the pot in the haybox somewhere between once and twice as long as you would have left it on the stove.  If you're worried about bacteria, bring the whole thing back to a boil for a few minutes on the stove before serving.

Homemade haybox

So how did my experiment go?  I brought my carcass and water to a boil and tucked it into an old comforter in a cardboard box.  (The image on the left shows the pot before I bundled the rest of the comforter over the top.)  Our house temperature was low on Sunday --- 50 degrees Fahrenheit --- but when I peeked in six hours later, the pot was still steaming and the stock was a lovely yellow.  Success!



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....or you could use a pressure cooker. :-)
Comment by Jennifer Mon Feb 8 11:33:53 2010
Very good point! I don't know why I never thought of pressure cookers as an energy-saving device --- probably because I'm terrified of them and have a mental block. :-)
Comment by anna Mon Feb 8 11:55:07 2010

My mother told me they used to have one at home when she was young. Apparently they were in widespread use in the Netherlands from ca. 1900 until after WW2. When everybody got connected to the natural gas mains in the sixties they fell out of use. Google "hooikist" for some nice pictures. Hmmm. I've still got an old duvet lying around. Might as well give it a try next time I'm boiling beans for chili. But I'm should check first if the polyester filling can withstand the temperature :-)

OTOH, a big vacuum-insulated thermos would probably even be better, provided the neck is big enough for whatever you're cooking. Time for some experiments in the kitchen.

Comment by Roland_Smith Mon Feb 8 14:03:40 2010

Interesting that your mother's actually heard of them! I'd never heard the term before (but my mom hasn't chimed in yet. :-) ) What did she cook in them?

Nice to get the "hooikist" clue! So many nice pictures by that name!

Comment by anna Mon Feb 8 14:44:52 2010

IIRC, almost everything that was to be cooked in water, but not baked or fried. It was mostly done to save fuel (coal in those days), otherwise someone might have to go into the coal cellar and get a new load in a special bucket called a "kolenkit", which was a dirty job. My Dad told me that when he was young, which ever of the siblings who had been naughty that day got that job. :-) Of course, coal was pretty expensive.

Especially suited for cooking like this was some kind of cheap meat that needed to be cooked for a long time with thyme and bay leaf. It's called "stoofvlees" (lit. stewed meat, not sure about the correct english term), it is very stringy cow or horse meat. It had to be boiled until it almost falls apart. My Mom liked it, but I always thought it was gross. Part of the reason why I'm a vegetarian to this day.

Comment by Roland_Smith Mon Feb 8 16:32:28 2010

I love your historical info! Being in intimate contact with our fuel --- hauling coal or wood --- sure does make us use less energy.

I cooked an old chicken the way you described cooking the old meat and I have to say it was edible but not very good. Much tastier to grind it up and make sausage out of it. I can see how that might turn you off meat....

Comment by anna Mon Feb 8 19:08:52 2010
Glad you tried out the method Anna and that it worked. I have not tried it yet myself. The thermos is also a good idea. I have taken whole oat groats, put them in boiling water in a thermos at night, and had fresh oatmeal in the morning. I also use a pressure cooker the odd time. They say it cuts down your cooking by 2/3. It is good for things like pea soup as well. I recently found a great recipe for risotto whereby you put 3/4 c. of arborio rice, a few sliced green onions, and a bit of olive oil in the pressure cooker, (also a tad of wine if you like). Saute for a bit with the lid off. Add 4 cups of homemade chicken stock, put the lid on and bring up to pressure. Cook for 6 minutes and you won't believe how good it is, and easy. I had never made it before because I did not want to stand there for 30 minutes stirring it. I think the newer pressure cookers are very safe but I did hear a story, back in the day, of a lady who got a new skylight, without even wanting one. :) I think this is one thing I would tend to buy new.
Comment by HeatherW Mon Feb 8 21:12:12 2010

Aha! I thought it was the other Heather who suggested hayboxes. User pages are coming in handy already.

I think you're totally right about new pressure cookers. I've got a couple of old ones but I'm very afraid! I figure a new one will wander into my life eventually and I'll give it a shot. Your recipes sound great (and I love your method of making oatmeal!)

Comment by anna Tue Feb 9 07:59:29 2010

There was this mythbusters episode where the rigged an electric boiler to blow. It blew out its bottom, went through a roof and up a couple of hundred feet high!

But they had to sabotage two different safety devices (temperature/pressure relief valve and thermostat) for that to work, and they had to take both pressure and temperature up to insane values.

Like boilers, pressure cookers these days have multiple safety mechanisms. Still, I think you're right to be weary. Everything dealing with high pressure and steam has to be handled carefully and needs to be maintained well.

Comment by Roland_Smith Tue Feb 9 14:48:24 2010
One more reason to avoid TV --- seeing that would have made me swear off pressure cookers forever!!! :-)
Comment by anna Tue Feb 9 15:21:06 2010

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