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.