I have not seen the book, but I have had a lot of experience baking deserts in Quetico.  I'm sure this method will work, but it will be time consuming and the results will be marginal.  The problem is that the walls of the outside pot are just too thin and either do not hold the heat or get too hot.  Your cake will be burnt on one side and not done in the middle.  This is the same problem as the disposable aluminum baking pans (see post to Cranberry).  The GSI aluminum ovens solve all the problems.  The pebbles on the bottom is the true answer.

I have also used a bedowin (sp?) oven and this also works.  It is very light weight and funcional.  I bought mine from Indiana Camp supplies but don't know if they are still in business of if it is availabe.

I have also used a bedowin (sp?) oven and this also works.  It is very light weight and funcional.  I bought mine from Indiana Camp supplies but don't know if they are still in business of if it is availabe. [/quote]

Hi, I have a quick question and I'm not picking on your spelling. I would like to clear up the type of oven you have and I'd like to get some additional info on it.  Now my understanding is that what is referred to as a bedouin oven is usully made with rock and partially buried underground, I've had goat from a bedouin oven and it does a fantastic job.  The other oven that I have run across is the bedourie oven used in the Queensland area of Austraila which may be  modification of the typical Aussie billie and that is a multi-use utensil which has a pot, a frying pan and other attachments.  The cooking parts are usually steel (spun?, stamped?) and the frying pan part has a removable handle and can either be used as a cover or can set into the top of the pot.  As an oven its used like a dutch oven with the frying pan set into the top of the pot and then partially buried in the coals and the coals heaped inot the frying pan/top.  Which type do you have and if you are happy with the steel pot type how does it compare to the traditional dutch oven.  I would think that the steel assembly might have hot and cold spots while the mass of the cast iron dutch oven would be more consistent in heat distribution.  Perhaps I am just over complicating the whole process. The bedourie is much lighter than a dutch oven and includes multi-use components which would be an advantage: can't even play frisbee with a dutch oven cover.

Cranberry,  After thinking about my post for making disposable aluminum ovens, I decided to go look at my old Boy Scout stuff and re-examin the construction.  I was a little off on the details!
Anyway, this is how we made them:  2 square disposable baking pans, 1 round disposable pie pan, 1 bolt (2" long), 2 washers, and 1 nut.  You make the oven top by poking a hole in the center of the pie pan and square baking pan.  Fasten the 2 pans together bottom to bottom with the bolt, washer, pans, washer, and nut.  The round pie pan holds the coals as the lid for your oven.  Place on top of the other square pan to bake.  You can open the top of the oven with a pliers by grabbing the end of the bolt to check what you're baking.  I just got a little confused with my other dutch oven invention.  The dutch oven frozen pizza baker.  But that's another story.

That is one fantastic device.  I love it!  After everyone's suggestions - here is what I ended up doing and it worked great.  My son seamsealer and myself went to the heart of Quetico this summer and I got three alumium foil cake pans (throw away type) and took them along.  I bought a bunch of cake mixes and corn bread mixes from Cub Food and away we went.  I got the a lot of hot coals, set one foil tin on the ground, put some 1 inch diameter rocks in the bottom, set the other pan inside that one.  I mixed the cornbread mix and poured it in the pan.  Then I put the third pan on top - turned upside down of course .  and then roled the edges all together.  I place the contraption in the coals, and scooped coals on top - enlcosing the whole thing.  Let it bake, pulled it out, and we had great corn bread, mixed up some powdered Jimmy Dean gravy, and WHAT A MEAL.  This whole rig weight a couple of ounces, and we used it 2 or 3 times before we stopped and trucked it out with us as scrap.  Worked great.  Thanks to everyone for the ideas that culminated in this rig.