- 5 pound bag of parboiled rice
- 1 tsp Aspergillus oryzae
We had a leftover, heavy cardboard box that was the perfect size for making rice koji in. We took a 5 pound bag of parboiled rice and rice it off very well. We then put it in a preheated 350F oven in a stainless steel container. The rice was well wrapped with foil to prevent dryness or steam escape.
As soon as we put the rice in the oven we turned it off and let the rice sit undisturbed for 12 hours. It easily fluffed up and was cooked but not at all mushy. We then added a teaspoon of Aspergillus oryzae (tane koji spores) and grew the koji out on the rice. We then made 3 different types of miso from the koji.