Simmering is a cooking technique in which foos are cooked in hot liquids kept at or just barely below the boiling point of water (at average sea level air pressure), 100°C (212°F). To keep a pot simmering, one brings it to a boil and then adjusts the heat downward until just before the formation of steam bubbles stops completely. Water normally begins to simmer at about 94°C (200°F).