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Choosing high-quality and non-GMO soybeans for nutritional value and purity. This stage sets the foundation for good tempeh texture and flavor.

Soybeans are soaked in water, which initiates the softening of the beans and starts the process of removing unwanted components like oligosaccharides.

Removing the outer husks of the soybeans to decrease fermentation time and improve the texture and digestibility of the final product.

This process further softens the beans, ensuring they are fully cooked and it also sterilizes them, providing a clean slate for the fermentation process.

Beans must be cooled to a suitable temperature to ensure that the tempeh culture can be effectively introduced with no damage from excessive heat.

A tempeh culture, often Rhizopus oligosporus, is mixed with the cooled beans; this stage introduces the spores required for fermentation.

The inoculated beans are kept at an appropriate temperature and humidity to encourage the growth of the mold and the fermentation process.

Post-fermentation drying is conducted to prevent over-fermentation and to extend tempeh's shelf life by reducing its moisture content.