What is a rolling boil?

A rolling boil is a vigorous state of boiling where large bubbles continuously rise to the surface and break, creating a constant and turbulent motion in the liquid. This level of boiling is typically reached when the temperature of the liquid is at or near its boiling point, usually around 212°F (100°C) for water at sea level. It is often used in cooking to ensure that food is cooked evenly and thoroughly, particularly for tasks like boiling pasta or blanching vegetables.