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2007-08-15 10:10:08 · 7 answers · asked by Sarrafzedehkhoee 7 in Food & Drink Ethnic Cuisine

7 answers

Having eaten it for breakfast in Japan many times and being a former chef, I can say this it would take a lot for natto to go bad, as the process to get it to the consistancy it is involved the starches and enzymes in the soya beans to be broken down and fermented, so in a sence it is already bad.

If you were to leave it on the warm counter for 3-6 months and let it get moldy and crust over, perhaps it would be bad then, but if after opening you keep it in the frig in a sealed container, I use a ZipLok bag, I have had a 500 gram pack for 1 month in the frig.

2007-08-15 11:53:42 · answer #1 · answered by The Unknown Chef 7 · 0 0

Telling if bad, how to keep...

12. Keep the natto in the refrigerator for a few days to one week for aging. It will develop a nice stringiness and richer taste.

If it is left for a long period even in the refrigerator, too much amino acids will crystallize, creating sandy texture. So after aging natto in the fridge , store it into several smaller packages, and freeze them.

About aging: An enzyme called protease is created in the process of natto bacteria fermentation. At around 0°C (32°F), natto bacteria form spores and becomes dormant, but the protease keeps breaking down soybean protein to amino acid. So keeping newly fermented natto at around 0°C (32°F) will age natto and give it a richer taste.

Note: If the natto fermentation is not successful, the finished natto may not be sticky enough, may not be stringy, or may be bitter or have strong smell of ammonia. On the other hand, white "frost" on the surface of natto as well as its stickiness does not guarantee the successful fermentation. Let's be careful about being sanitary when making natto so as not to introduce undesirable germs that contaminate natto.

2007-08-15 10:34:58 · answer #2 · answered by Anonymous · 2 0

It's difficult to imagine natto getting any more disgusting than it already is when it's just purchased. I have to admit that I am one of those rare individuals who love the smelly & slimy concoction. Natto is best fresh but I often freeze the beans if I plan to not devour them in a reasonable amount of time. To answer your question, I will dump my natto in the trash when the beans have begun to shrivel and lose their gooey goodness.

2007-08-15 10:41:26 · answer #3 · answered by Tacymevol 5 · 0 0

When they stop listening to you, stay out all night and smell of alcohol.

2007-08-15 11:40:30 · answer #4 · answered by Dave C 7 · 5 0

What is the white stuff around the beans, is it mold

2014-12-19 06:15:19 · answer #5 · answered by S 1 · 0 0

natty lite? Taste it.

2007-08-15 10:16:10 · answer #6 · answered by CSSW 5 · 0 0

isnt it already bad? how much worse can it get?

2007-08-15 14:06:18 · answer #7 · answered by Desi Chef 7 · 0 0

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