Everything You Need to Know About Thermal Cooking

What is Thermal Cooking?

Thermal cooking is known by various names, including retained heat cooking, insulated cooking, thermos cooking, and fireless cooking, among others, which are often used interchangeably.

The method involves retaining or trapping heat with an insulator that decelerates the cooling process. An effective insulator maintains the pot's high temperature and significantly reduces heat loss.

This unique and energy-efficient cooking technique utilizes the heat retained to cook a range of dishes. It starts with heating the food in a pot on a standard heat source until it boils. Then, the boiling food is quickly moved to an insulated container, such as a thermal cooker. The essence of thermal cooking is in the residual heat contained within, which continues to cook the food gradually and uniformly, without the need for further energy.

Thermal cooking is particularly beneficial for dishes that require long cooking times, such as stews, soups, rice, and even unconventional items like bread and cupcakes. Thermal cooking not only conserves energy but also preserves the essential nutrients, flavors, and moisture in the food, leading to more delicious and nutritious meals. Moreover, it provides the convenience of not needing constant supervision, making it perfect for busy individuals or those aiming to reduce their kitchen's carbon footprint. In a time when sustainability and efficient cooking practices are increasingly important, thermal cooking emerges as an eco-friendly and effective culinary technique.

What are the Benefits of Thermal Cooking?

Save Money

Thermal cooking is energy-efficient and eco-friendly, reducing costs while conserving resources compared to traditional cooking methods.

Save Time

Thermal cooking saves time by eliminating the need for constant monitoring and allows for simultaneous cooking of multiple dishes.


Thermal cooking preserves nutrients for better health and benefits resource-limited areas by minimizing cooking time and reducing open fire reliance, saving lives.

Portable and Convenient

Thermal cookers are portable and perfect for picnics, camping, and potlucks. They require little effort, doing the cooking, and are easy to clean.

Preserves Flavor and Nutrients

Thermal cooking allows flavors to develop, creating richer tastes while preserving nutrients due to extended cooking times.


Thermal cooking accommodates diverse dishes, from soups and stews to curries, casseroles, desserts, and even bread, showcasing its versatility.

What Are the Types of Thermal Cookers?

Stainless Steel

Stainless steel thermal cookers come in two insulation types. While they may be expensive, they offer significant efficiency and user-friendly advantages, making them a valuable investment in culinary convenience.

HopeSaCs & Other DYI

HopeSaCs, Super-Insulated Cooking Bags, were initially designed for low-resource settings but are highly efficient and cost-effective, making them suitable and attractive for use in various locations, regardless of resource availability.

Thermalcooking.net aims to provide its customers with an exceptional customer experience by offering reliable and high-quality thermal cooking information and products, while operating with honesty and integrity.

1. Access the Free eBook

"10 Ways to Improve your Thermal Cooking Skills" is a valuable resource for beginners in thermal cooking. With ten tips to enhance your proficiency, this eBook offers practical advice and encourages exploration, helping you understand the nuances and create delicious meals efficiently. Whether a novice or looking to refine skills, it's a valuable companion for maximizing the potential of this energy-efficient cooking method.

2. Purchase a thermal cooker

Thermalcooking.net offers a diverse selection of thermal cookers, including stainless steel and HopeSacs, along with accessories like pots for HopeSacs and bread containers. We also provide the "Let's Make Sense of Thermal Cooking Cookbook" and digital products to enhance your thermal cooking skills and efficiency. Explore our offerings to elevate your culinary experience.

3. Join our TCS Community

Great news! Our Thermal Cooking Show Community is now live! Join us to exchange tips, ideas, ask questions, and share mouthwatering pictures as we dive into the world of thermal cooking together. Let's build connections and collaboratively craft fantastic meals through the art of thermal cooking. Your culinary journey awaits!!

What's Cooking without a Cookbook?!

The "Let's Make Sense of Thermal Cooking Cookbook" is a must-have resource for anyone intrigued by thermal cooking. It not only provides a deep understanding of thermal cooking principles but also delves into food storage integration, including freeze-dried and dehydrated meals from scratch.

Written by Cindy McMullin Miller, the book is a treasure trove of knowledge and insights. It features her family's favorite dishes, all adapted to thermal cooking techniques. This cookbook enables you to become a master of thermal cooking while savoring a diverse array of mouthwatering recipes.

Available in both hardback and digital formats, this cookbook is suitable for both novices and experienced cooks. It enriches your culinary skills and deepens your grasp of this efficient and flavorful cooking method. Whether you seek convenience, taste, or resourcefulness, the "Let's Make Sense of Thermal Cooking Cookbook" promises a rewarding culinary journey.

Introducing the HopeSaC Thermal Cooker

Who knew something so simple could make such a difference?

The HopeSaC Thermal Cooker is a revolutionary kitchen appliance designed to address the needs of low resource settings and humanitarian trips. Born out of a mission to provide efficient cooking solutions in challenging environments, this thermal cooker has gained popularity as a versatile alternative for anyone seeking a reliable cooking option. Its innovative design and advanced insulation allow it to retain heat and cook food without the need for continuous energy supply. With a simple yet effective construction, the HopeSaC Thermal Cooker offers a convenient and safe cooking experience, making it an invaluable tool for those in remote areas, as well as a practical choice for everyday cooking in any situation.

Digital Combo Special

Here's the link I mentioned in my class for a discounted price on my digital product bundle. It's a special offer, so anyone stumbling upon this, consider it your lucky day! Feel free to enjoy the discount as well. 😊

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Humanitarian Organizations


Friends and Families



I pre-ordered this book and when I got it I LOVED it so much I couldn't put it down. If you like the idea of cooking with very little energy used, this book is one you have to get! It's put together beautifully, user friendly and easily understood. The recipes are fantastic. I've been to 2 classes taught by the author, Cindy Miller, and tasted the recipes she fine tuned to use with a thermal cooker and they were WONDERFUL! I love the idea of putting recipes together in jars or bags to use for future times when life is always busy. The writing in the book feels like she's next to me in the kitchen helping me cook. Very Well done Cindy!!!!.

- Jan


And not surprisingly, I still refer to this great little book which started it all for me. After all these years, few cookbooks exist on the subject & no other thermal cooker book even comes close.

No buyer's remorse here. Investing in this book & my (first) cooker was good for my time management, good for our tummies & good for the planet.

××00××00×× Win. Win. Win. ××00××00××

- Valty

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