A cardboard box will make an oven — and it works just as well as your oven at home! There are different ways to make a cardboard box oven.
1. The open top Box Oven
Cut off the flaps so that the box has four straight sides and bottom. The bottom of the box will be the top of the oven.
Cover the box inside COMPLETELY with foil, placing the shiny side out.
To use the oven, place the pan with food to be baked on a footed grill over the lit charcoal briquets. The grill should be raised about ten inches above the charcoal. Set the cardboard oven over the food and charcoal. Prop up one end of the oven with a pebble to provide the air charcoal needs to burn – or cut air vents along the lower edge of the oven.