flour<br />

Flour is a powder produced by grinding cereal grains, legumes, nuts, or seeds into fine particles. While wheat flour is the most common, flour can be derived from rice, corn, rye, barley, oats, or various other sources depending on regional availability and culinary tradition. The grinding process breaks down the grain into its constituent parts: the starchy endosperm, the protein-rich bran, and the nutrient-dense germ. The fineness and composition of flour varies significantly based on the grain source, milling technique, and extent of refinement; refined white flour contains primarily the endosperm, while whole-grain flour retains all components of the original grain.

Wheat flour is characterized by its gluten content—a network of proteins that develops elasticity when hydrated and kneaded—making it uniquely suited for bread-making and other leavened baked goods. Different wheat varieties yield flours with varying protein contents (10–14% for all-purpose, 12–15% for bread flour, 7–9% for cake flour), affecting the texture and structure of finished products. Common wheat flour varieties include all-purpose, bread, cake, pastry, and self-rising formulations, each engineered for specific baking applications.

Flour serves as the structural foundation for breads, cakes, pastries, pasta, and countless baked goods across virtually every culinary tradition. In bread-making, gluten development in wheat flour creates the elastic matrix that traps fermentation gases, producing an open crumb structure. Beyond baking, flour functions as a thickening agent in sauces and gravies (especially when prepared as a roux with fat), as a dusting agent for fried foods, and as a base for batters and doughs. Different flour types are selected according to desired outcomes: bread flour for chewy loaves, cake flour for tender crumb, whole-wheat flour for dense texture and nutty flavor. Non-wheat flours (rice, almond, chickpea) are employed in gluten-free baking, regional cuisines, and specialty preparations.