Sauces are flavorful liquids that are thickened to enhance food. There are five main types of sauces called "mother sauces" - bechamel, espagnole, hollandaise, tomato, and veloute. Each has characteristic ingredients, thickening methods, and derivative sauces. For example, espagnole is made from brown stock and roux and can be used to make bordelaise or lyonnaise sauces. Proper sauce qualities include color, opacity, taste, texture and consistency.