Linda0818
Head Chef
If you put a spoon across the top of the pot, the spoon prevents boil-overs to a degree. Even out of the corner of my eye I can see two uneven, half-circle towers of bubbles rising above the rim of the pot. There's something probably scientific that would explain why breaking the foam tower as it rises causes the foam to not roll over the edge. I suppose it would overflow if I waited long enough, but I'm not testing my theory.
In my experience, placing a wooden spoon across the pot of anything simmering/boiling prevents it from boiling over.