Shiro or white miso paste
The fermentation time is quicker for this miso, 3 to 4 weeks, over a
heavier miso, which can take
6 months to a year or more.
1 -cup dry soybeans
3 ½ -cups light rice koji
2 ½ -tbsp sea salt
1-cup soybean cooking water
1 -tbsp un-pasteurized seed miso (optional or buy locally)
Note: The seed miso aids in the faster culturing of the fresh koji rice.
Any type of un-pasteurized miso paste will work. It contributes active beneficial cultures, which in turn assist in the maturing/aging process. If you make a good batch of miso, make sure to save some of the paste for an inculcation of new batches.
Yield: 4 ½ cups
Fermentation Time: 3 to 4 weeks
Aging Temperature: 77F (25C)
Fresh koji rice for making miso paste
Drain the soybeans, reserving enough cooking liquid. Transfer the soybeans to a mixing bowl and mash thoroughly. Add the reserved cooking liquid and salt over the beans, mix. Allow the soybeans to cool below 140F (60C), before adding the koji rice and seed miso. If the soybeans are too hot, the heat could kill the koji-rice mold culture. Mix again.
Now that the ingredients are mixed, it is time to pack the miso mixture into your jars. This recipe will pack a 1½-quart jar. Sterilizing the crock or jar is recommended to help prevent contamination. Sterilize a dry crock or jar by heating it upside down, in the oven at 300 F for 30 minutes. Allow to cool before moving. You can use a beer sterilizer, too.
Pack the mixture into straight-sided jar or fermenting crock. Expel any air bubbles trapped in the mixture (a chopstick works well for this). Flatten the surface and sprinkle enough salt to cover the miso mixture making sure to cover the edges. Cover this with clean plastic wrap, placing it directly on the salted mixture and up the sides. Place a weighted lid or bag over the plastic wrap. Make sure the weights are pushing down on the mixture. Lastly, cover the top with a breathable cloth or paper to keep out dust and contamination. You can vary the recipe a bit if desired, until it is to your liking.
This part of the process involves allowing the packed koji rice miso to ago. For Shiro miso, the period is 3 to 4 weeks. Once minimum ago is reached, take a sample to taste. However, try to save some to allow further aging to compare taste. Smooth the surface once again adding a bit of salt to cover.
Make sure to label each batch with information such as type, date packed, recipe used, date completed, etc. Keeping good records will allow the next batch to taste the same as previous batches or you can try new variations to your liking.
A quick miso soup
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