How to tell if Koji rice is bad?

How to tell if Koji rice is bad? - Cooked Food on White Ceramic Plate

I have some store bought Cold Mountain brand Koji rice. On the container it says it keeps in the fridge for "6-12 months". I've had it for about 8 months, but can detect no change from when I bought it by either sight (still white and chalky), touch (perfectly dry), or smell (not sour, a little sweet).

That said, this is a fungus we're dealing with, so I want to be sure I can still use it.

How can I tell if Koji rice is still good to use?






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How do you know if koji is bad?

Koji start as a white fuzz and may ripen to a yellowish hue, which means that its spores are starting to flower. Either white or yellow is fine, but if it's any other color, you should throw it out. As far as smell goes, it should be pleasant, sweet, and mushroomy. If it smells rancid or off in any way, dispose of it.

How long does koji rice last?

How Long Can You Keep Koji Rice? If you make fresh koji at room temperature, you should use it within one day of making it. Generally, it's fine to refrigerate it for about a week, but if you want to keep it longer, you can freeze it, and it will keep for about six months to a year. It can also be dried.

What should koji smell like?

Koji smells like a sweet fra-grant combination of apples, fresh yeast, champagne, and honey-suckle. When you smell it for the first time, you see why people decided to use it as a food more than 9,000 years ago. It's irre-sistible.

Why is my koji green?

The green color is mold spores. Once the koji is green, remove the damp towel, and allow the koji rice to dry out in the incubator. After the rice has completely dried out, store it in the freezer.



How to make Koji rice at home




Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Vinícius Caricatte, Önder Örtel, Önder Örtel, Tom Adabi