.5 liters water

Water is the simple chemical compound H₂O, composed of hydrogen and oxygen in a 2:1 ratio. It is essential to all known forms of life and constitutes the primary solvent in culinary preparations. In cooking, water refers to potable (drinkable) water, which may originate from municipal supplies, wells, springs, or purified sources. The mineral content, pH, and chlorine levels vary depending on source and treatment, which can subtly influence the flavor and outcome of recipes, particularly in baking, tea preparation, and stock-making.\n\nWater exists in three states relevant to cooking: liquid water (the standard form), steam (heated above 100°C at sea level), and ice (frozen below 0°C). Its neutral flavor profile, high heat capacity, and ability to dissolve salts, sugars, and other solutes make it indispensable in virtually every culinary application.

Water serves as the fundamental medium in countless culinary techniques. It is essential for boiling, steaming, poaching, and simmering proteins, vegetables, and grains. In baking and pastry work, water hydrates flour and enables gluten development, while also serving as a vehicle for dissolving yeast and salt. Water forms the base of stocks, broths, sauces, and soups across all cuisines. It is used to blanch vegetables, cook pasta and rice, and prepare beverages from tea to coffee. The quality of water—particularly its mineral content and pH—can affect fermentation in bread-making and the extraction of flavor compounds in tea and coffee preparation.