2, soak soybeans for more than ten hours until soybeans completely soaked.
3, soaked soybeans drained, add a small spoonful of sugar and stir.
4, steamed, will be added to the sugar soybean into the electric pressure cooker in water for one hour, with the hand can be crushed soybean for the top.
5, with a little warm water to melt natto bacteria, pour into the steamed soybeans and mix well.
6, will be mixed with the natto bacteria soybean into the crockpot, the surface covered with gauze or thin towels, the crockpot to yogurt mode, fermentation time should not be less than twenty hours. There is no crock pot or yogurt machine, you can put the soybean on the heater, covered with a good gauze towel can be, electric blanket warming can also try, but it is best to prepare a thermometer, need to pay attention to is the fermentation temperature can not be lower than 40 degrees Celsius, the time should be a minimum of 20 hours.
7, fermented soybeans, the surface with a thin layer of white film, stirring a little will have a lot of silk, natto production is complete. Put into the refrigerator overnight, the next day better taste.