Sounds like the milk was old and on the verge of going sour. Heating it would have caused this to happen. I've had milk spoil even before the "sell by" date on the container, so it's pretty hard to trust those dates anymore. Who knows how many temp changes the milk goes thru before it gets to the store cooler, I had yogurt ferment too, before the sell by date, and when I called Yoplait about it, they told me that temp changes back and forth, will most definitely cause this. They sent me over $20 in coupons for the $8 I paid for the yogurt that was bad.
Bookmarks