The 5 essential derivatives of Béchamel sauce are: Mornay sauce. Cheese sauce. Mustard sauce. Soubise sauce. Nantua sauce. Each of these sauces has a unique flavor and is versatile enough to be used in a variety of dishes. Mornay sauce is made with Gruyere and Parmesan cheese, while cheese sauce is a simple combination of Béchamel and your preferred type of cheese. Mustard sauce adds a tangy kick to your dish and can be customized to your liking. Soubise sauce is made with slow cooked onions, an