How long is it safe to keep milk at room temperature?

Answer by  sweetiejen (107)

Milk shouldn't be kept at room temperature for very long at all. It will definitely start to spoil if you leave it out longer than two hours, but it's not healthy to leave it out much longer than a half an hour. It will get warm and start to sour.

Answer by  diane23 (1167)

A glass of milk should be fine for a couple of hours, but you should return the container to the refrigerator immediately. The longer it sits out, the more likely it is for bacteria to grow and it will spoil faster, even if it is refrigerated.