How to Make White Sauce - This simple roux-based homemade sauce is one of the French mother sauces known as Béchamel sauce and is easy to make at home! All you need is butter, flour and milk. Season with salt and nutmeg (optional). Also learn how to make a delicious homemade gravy, cheese sauce, and cream of sauces using this technique. A must learn even for novice cooks! White gravy is great for making breakfast foods, sausage and gravy, chicken and biscuits, pot pies, and more!