The term "rich sauce" is a culinary expression that refers to any thick, creamy or gravy-like sauce made from a base of butter, cream, eggs and/or milk. These ingredients are whisked together and then simmered with other components such as herbs, spices, vegetables or meat juices until the desired consistency is achieved. Rich sauces can be used to enhance the flavor and texture of a dish, and they are commonly served over meats, seafood, pasta or vegetables. Examples of rich sauces include béchamel, velouté, espagnole, hollandaise, and bourbon sauce.