Step 1

1. Soak the soybeans in about three times the amount of water one night in advance.

Step 2

2. Clean the soaked soybeans, put them in a sterilized container, put them in a steam oven at 100 degrees, and steam them for about 2-3 hours until they are crushed by twisting them with your hands.

Step 3

3. Prepare the sterilized container and mixing spoon in advance, filter the steamed soybeans out of the water and put them in a new container.

Step 4

4. Add white sugar while hot, mix well and let stand until about 55 degrees.

Step 5

5. In a small bowl, use warm water to evenly dissolve the natto bacteria and set aside.

Step 6

6. Pour the dissolved natto mushrooms into the soybean bowl, stir well with a spoon sterilized by boiling water, cover the utensils with a layer of plastic wrap and poke some holes with toothpicks.

Step 7

7. Set the fermentation function to 40 degrees for 18-24 hours in the oven, put in the soybean utensils, put a chopstick on the oven door and leave an appropriate gap for fermentation.

Step 8

8. After fermentation, take it out and let it stand to room temperature, put it in the refrigerator for 1-2 days and eat it more deliciously.