1
vote
0answers
72 views

Should pasteurised milk go bitter instead of sour when it is close to its expiration date? [on hold]

I bought some milk today on a special offer, its expiration date being tomorrow, and after leaving it outside, in one of the still-sealed boxes, for a few hours, the milk went bitter. But milk ...
3
votes
2answers
1k views

Why do kefir grains stop growing in soy milk?

Kefir is a fermented milk drink made with kefir grains. It usually is prepared by inoculating cow, goat or sheep milk with kefir grains. I would like to prepare the drink with soy milk, which worked ...