.2 cup water

Water (H₂O) is a colorless, odorless liquid compound essential to all life and central to culinary practice. In cooking, water functions as a solvent, cooking medium, and ingredient in its own right. Its properties—including its ability to dissolve salts and sugars, conduct heat efficiently, and participate in chemical reactions like hydration and gelatinization—make it fundamental to nearly every culinary technique. The mineral content and pH of water vary by source and region, affecting flavor and cooking outcomes; hard water (mineral-rich) and soft water (mineral-poor) produce different results in baking, cooking legumes, and other applications.

In culinary contexts, water quality matters: chlorinated tap water may impart off-flavors, while distilled water lacks minerals that enhance flavor. Different cuisines and techniques employ water in varying ways, from steaming and poaching to hydrating grains and creating stocks.

Water is used across all cuisines as a cooking medium for boiling, steaming, poaching, and simmering. It hydrates dried grains, legumes, and pasta; dissolves salt, sugar, and other solutes in sauces, broths, and doughs; and serves as the primary ingredient in stocks, consommés, and soups. In baking, water controls dough hydration and gluten development. It also functions as a cooking liquid for braises, curries, and stews, and appears in beverages from tea to simple syrups. The mineral content of water—particularly calcium and magnesium in hard water—affects cooking times for legumes and the texture of baked goods.