Sick of lumpy sauce? Hate making that flour and butter roux? Here's the answer! This is the easiest version of White Sauce ever. You won’t believe it works until you try it! You will need a wire balloon whisk for this recipe and you must make sure that all ingredients are cold (or at least at room temperature) to begin with. Thanks to English food writer, Delia Smith, for discovering this all-in-one method. The following are my simplified adaptations for Basic White Sauce, along with variations for Mustard Sauce, Cheese Sauce (Mornay Sauce) and Parsley Sauce.