qt / ½ l water (or half water

Water is a simple chemical compound consisting of two hydrogen atoms bonded to one oxygen atom (H₂O). It is the most abundant substance in the natural world and essential to all known forms of life. In culinary contexts, water serves as a universal solvent and cooking medium, with its properties (pH, mineral content, and temperature) varying by source and location. Tap water, spring water, mineral water, and distilled water each possess distinct characteristics that influence their use in cooking, baking, and beverage preparation.

Water is fundamental to virtually all cooking methods: it serves as the primary medium for boiling, poaching, steaming, and braising; a primary ingredient in stocks, soups, and sauces; and an essential component in dough, batter, and paste formulations. The mineral content and pH of water can significantly affect cooking outcomes—particularly in baking and stock-making. Hard water (mineral-rich) may affect texture in some preparations, while soft water is preferred for certain applications like tea brewing and clear stocks.