Sustainable Skills Series: Heat Retention Cooking (Making a WonderBox)

Heat retention cooking is as old as civilization, but most modern people have forgotten this efficient method of preparing food that conserves both energy and water.

This class will cover a brief history; various types of heat–retention cookers in both emergency and long-term applications; as well as the fundamentals of cooking and food safety while using this technique.

All heat-retention cookers work from the fundamental principle of putting a hot pot of food into a highly insulated box. A wonderbag is a fabric, drawstring-type cooker that cinches around the hot pot. A wonderbox is more like a fabric box with a lid that the pot sits inside.

In the fall class, students made wonderbag-style heat retention cookers; for this spring class, each student will complete a wonderbox-style cooker to take home.

There will be a break for lunch — and students will get to have a meal provided by our instructor Heather Stevens, that has been prepared by using a wonderbox!  *Please let us know  if you have any food allergies.



Date: March 22, 9 – 4 pm.

Class Size: Limited to 6

Location: The Herban Path, central San Antonio

902 W. French Place, San Antonio, 78201

Tuition: $75.  *There is a $25 materials fee due to the instructor at the start of the class.

How To Register:

To sign up using a credit card, visit our Square Store

To sign up using Paypal, visit our Meetup page

To register using a check, money order or cash, please email us at: