A pastry brush is a kitchen tool used primarily for applying liquids like egg wash, melted butter, or glaze to pastries and baked goods. It typically features a handle made of wood, plastic, or silicone, and bristles made from natural or synthetic materials. The bristles help evenly distribute the liquid, enhancing the appearance and flavor of the final product. Pastry brushes come in various sizes and shapes, allowing for versatility in the kitchen. They are essential for tasks such as greasing pans, basting meats, or brushing dough with oil. Proper care, including cleaning after each use, ensures the longevity of the brush.