
INGREDIENTS
- 1/2 lb of organic natto-specific soybeans (from Laura Soybeans)
- Natto starter
- Water
DIRECTIONS
- Wash soybeans until water is clear
- Drain, and add water 3:1 ratio
- Soak soybeans overnight (16-24 hours)
- Remove any skin or bad beans
- Transfer beans to Instant Pot, and cover with 1″ water over beans
- Pressure cook on “bean mode” for 30 minutes, Natural release 15 minutes. Let cool for 20 minutes (temp drops from 175° to 130°)
- Sterilize glass bowl, rice bowl, chopsticks, and spoon in boiling water
- Drain soybeans, saving some broth
- Place soybeans in glass bowl, stir in 1 spoon of Natto, mix well, add 2 Tbsp of broth, stir more
- Cover bowl with plastic wrap, and punch holes with sharp knife, push down to make contact with soybeans. Then cover bowl withe a second layer of plastic wrap, to trap air between the two layers.
- Add some water to bottom of the incubator to form humidity
- Place bowl on trivet in the Brod & Taylor bread proofer
- Set the temperature to 99°F for 12 hours (the bean temp is 10-15° warmer than the air temperature shown on the bread proofer
- Set temperature to 94°F for next 8-10 hours
- It is done fermenting in the incubator when a film forms on the surface and sides of the natto, and a pungent odor is noticed.
- Leave at room temp a couple of hours to cool.
- Continue fermenting in fridge for 3-5 days to mellow for best flavor.
- Freeze what cannot be consumed within a few days
- Season with soy sauce or soup base before consuming.












