Get our free book (in Spanish or English) on rainwater now - To Catch the Rain.

Easy Retained Heat cooker

From Appropedia
Jump to: navigation, search


The following is a step by step guide to building a retained heat cooker that was designed for the purpose of the Jefferson Community Center workshop 2013

Building Instructions[edit]

This is an easy process using less than 10 dollars worth of materials


  • 1 Cardboard Produce Box
  • 1 Roll of Aluminum Foil
  • Duct tape
  • Paper (newspaper is preferred)
  • 1 Mylar emergency blanket
  • Scissors

How to Build[edit]

Building your own retained heat cooker
Figure 1: Cardboard box is lined with paper Step 1: Line the main box with paper
Figure 2: be sure to allow the foil to drape over sides of box Step 2: Line the cardboard box with aluminum foil
Figure 3: Mylar Blanket Step 3: Line the Box with a Mylar emergency blanket, be sure to reduce the number of air pockets.
Figure 4: the final cooker Step 4: Repeat steps 1 and 2 with the lid of the box
Figure 5: You're Done! Step 5: The cooker is now complete! For use just place some blankets and towels inside, and seal a cooking pot in the cooker.


The cooker is easy to use. Simply bring a meal to the proper temperature and leave it there for at least 2 minutes, then seal it in the box. Leave it in the box until cooking is completed. It should be noted that recipes using this method require less spicing and usually 50% more time to cook, so plan accordingly.

Maintenance and tips[edit]

  1. Clean your cooker between each use.
  2. Be sure to wash all blankets and towels used in the cooking process
  3. Do not leave your cooker in areas where it could get wet.
  4. Always ensure that your food is fully cooked before consuming
  5. Experiment with new recipes! Stews and soups work well with this method.