In this summer heat, how would you like to cook without heating up the oven?
What about not even using the kitchen?
How about not having to stand over a hot grill?
Yes, the answer to all of your culinary problems is…
…The Solar Cooker!
I decided it might be fun to make our own solar cooker/oven. I did a minor amount of research and found several neat sites. It looks like anyone who’s anyone is cooking with the sun. Obviously if I’m going to cook gourmet meals once the entire economy collapses and the power grid is down, I’d better get started! (Just kidding, kind of.)
There are several kinds. We decided to go for the box cooker.
First get two boxes of different sizes. Make sure that the smaller box fits inside the larger one with at least an inch to spare around all sides and the bottom. Use paper or something (not plastic) to fill some of the space on all sides of the inner box. Air is a good insulator, but you will have to use something as spacers to keep the sides from touching. Then cover over the gap between the two boxes.
Find something black to cover the interior bottom of the box. Black paper would work fine. I couldn’t find any so we used a piece of black cloth and taped it down. Don’t use duct tape because as it heats up it will emit fumes. The cover the interior sides with aluminum foil. I found this easier to do when the small box was not inside the large box.
You’ll then want to increase the surface area of your flaps. You didn’t cut them off, did you? We cut the flaps off another larger box and taped them on. Then cover them (the inside part) with foil and tape down.
Then just slide the small box carefully into the large one.
Most ovens have doors. Hm. Ideally you would use glass but not only did we not have a spare piece of glass just sitting around, it would be a little heavy on our cardboard, tape and foil concoction. I had read that two layers of plastic wrap would do the trick. The problem: taping it down to the box wouldn’t be smart. When you pulled the tape aside to check the food, the foil would rip. You need a frame…
Well, wouldn’t you know it. Two coat hangers taped together perfectly fit the inside opening of the box! Now wrap with plastic wrap. It doesn’t need tape because it sticks together.
Checking the fit…
What to cook in? You’re supposed to use dark metal pans. The only things I have that fit that description are a bundt pan and a roaster. Not practical. I settled for a dull rather than dark finish. Shiny absolutely won’t work because it reflects the heat away from the food. These are some elderly bread pans.
What to cook? I settled on brownies. Quick, and if all else fails, not too bad runny. You need to put something in the bottom of the cooker so air can circulate all around the pans. I chose some wooden spoons.
In they go!
We covered them with the, um, oven cover.
Now you just wait. And wait. We put them in the oven about 1:00.
I checked them after about two hours. You can see that one side is more done than the other. I turned the box around and adjusted the flaps. It would have been better to have been able to angle the box toward the sun, but you have to have a cooking base on gimbals for that (unless you like diagonal brownies).
After four hours we took them out. About a third of each pan was done, the rest was still very soft. I cut out the done bits and put the rest in the oven (what the heck). It still tasted good!
Why not try it?