Prevent the pasta water from boiling over by using a large pot
According to America's Test Kitchen, the foolproof way to prevent pasta from boiling over is to use a large pot on a small burner.
Although the saying "a watched pot never boils" isn't scientific, many people keep a watchful eye on the pot to prevent the water from boiling over. The aroma of starchy water on the hot stove isn't exactly inviting, and science explains how and why this happens.
After experimenting with various methods, America's Test Kitchen found that a large pot on a small burner is all you need. By keeping the pasta in constant motion, the boiling mimics continuous stirring, reducing the chance of the water boiling over. The large pot gives the pasta room, and the small burner helps regulate the temperature.
Surface tension explains why certain objects float, and according to The Takeout, it can be useful when cooking pasta. Its author suggests adding oil, which is less dense than water: as bubbles rise, the oil repels them and helps prevent boiling over. But The Takeout refutes the idea that oil prevents pasta from sticking: for that, you need to stir it.
Cooking pasta seems simple, but scientific knowledge helps. The wooden spoon, used to break the bubbles, doesn't work: a vigorous boil can cause even a wooden spoon to boil over. Many brands sell utensils to prevent pasta from boiling over, but technology is no substitute for a cook keeping a watchful eye on the pot.
