I make bulk pinto beans as follows: Soak beans overnight in salty water
Cook until tender, adding chopped onion and Serrano pepper
Drain completely, place onto baking sheet to cool (~100F, this takes about 15 min)
Place baking sheet in freezer until cold, then place into ziploc bag
Okay, pretty normal. I can't really do anything more with the temperature aspect. However, within 3 days the beans have a noticeable, but somewhat faint, farty odor when I open the bag. I usually just mix them cold with freshly cooked rice, which immediately brings them up to temp. I'm only on the fourth day now and I can smell fart just from the beans in my stomach!
Is this normal? What can I change to make them last a bit longer. I suppose I could just freeze them but I'd like to hear from those more knowledgeable about the fermentation process.