<p>Yup, cardboard boxes are very useful. I've actually made an oven and baked a cake and biscuits in one.<br>Line the inside and outside with foil, place four pop cans on end with about 6-8 pieces of well lit charcoal between them and your pan on top of them. Then put the box over this for about 20-25 min <br>(no peeking!!) and it should be done. <br>Though this post probably belongs in the OTR recipes, kinda handy info for when you wanna boondock and have yer cake too ;-)</p>