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Place the 500 grams of dry peeled soybeans into a pot. Add enough water to generously cover the soybeans.

Soak the soybeans for 24 hours. This step helps to rehydrate them.

After soaking, drain the water from the soybeans.

Transfer the soaked soybeans back to the pot and add fresh water. Boil them for 30 minutes to soften.

Drain the boiled soybeans thoroughly.

Spread the boiled soybeans in a single layer on a cooling tray that has been covered with a clean kitchen towel. It is crucial that the soybeans are completely dry before proceeding, as excess moisture can hinder fermentation. Allow them to air dry.

Once completely dry, transfer the soybeans to a clean bowl.

Add the 2 tablespoons of rice flour and 1/2 teaspoon of tempeh starter culture to the dried soybeans in the bowl.

Using clean hands, mix all the ingredients well, ensuring the starter culture and flour are evenly distributed over the soybeans.

Evenly distribute the soybean mixture into sealable bags. Do not overfill; a thin layer is ideal for proper fermentation.

Using a toothpick, poke numerous small holes all over the bags. These holes are essential for aeration, which the tempeh culture needs to grow.

Place the prepared bags on a cooling rack, allowing air circulation around them, for incubation.

Incubate the tempeh for 24-48 hours. The ideal temperature for fermentation is 30-32°C (86-90°F). If you don't have a thermometer, place the bags in a warm spot with good air circulation, such as on top of a refrigerator or in a heat-pump cupboard with the door slightly ajar on colder days. This stage is about trial and error to find the best spot in your environment.

After 24-48 hours, the soybeans should be bound together by a dense, white mycelium, indicating the tempeh is ready to cook. It should have a firm texture and a pleasant, mushroomy aroma.


Place the 500 grams of dry peeled soybeans into a pot. Add enough water to generously cover the soybeans.

Soak the soybeans for 24 hours. This step helps to rehydrate them.

After soaking, drain the water from the soybeans.

Transfer the soaked soybeans back to the pot and add fresh water. Boil them for 30 minutes to soften.

Drain the boiled soybeans thoroughly.

Spread the boiled soybeans in a single layer on a cooling tray that has been covered with a clean kitchen towel. It is crucial that the soybeans are completely dry before proceeding, as excess moisture can hinder fermentation. Allow them to air dry.

Once completely dry, transfer the soybeans to a clean bowl.

Add the 2 tablespoons of rice flour and 1/2 teaspoon of tempeh starter culture to the dried soybeans in the bowl.

Using clean hands, mix all the ingredients well, ensuring the starter culture and flour are evenly distributed over the soybeans.

Evenly distribute the soybean mixture into sealable bags. Do not overfill; a thin layer is ideal for proper fermentation.

Using a toothpick, poke numerous small holes all over the bags. These holes are essential for aeration, which the tempeh culture needs to grow.

Place the prepared bags on a cooling rack, allowing air circulation around them, for incubation.

Incubate the tempeh for 24-48 hours. The ideal temperature for fermentation is 30-32°C (86-90°F). If you don't have a thermometer, place the bags in a warm spot with good air circulation, such as on top of a refrigerator or in a heat-pump cupboard with the door slightly ajar on colder days. This stage is about trial and error to find the best spot in your environment.

After 24-48 hours, the soybeans should be bound together by a dense, white mycelium, indicating the tempeh is ready to cook. It should have a firm texture and a pleasant, mushroomy aroma.
