Cold Dutch or American Sauce, for Salads of Dressed Vegetables, Salt Fish, or Hard Eggs

Method

Put into a saucepan three ounces of good butter very smoothly blended with a quite small teaspoonful of flour, and add to them a large wineglassful of cold water, half as much sharp vinegar (or very fresh, strained, lemon-juice) a saltspoonful of salt, and half as much cayenne in fine powder. Keep these shaken briskly round, or stirred over a clear fire, until they form a smooth sauce and boil rapidly; then stir them very quickly to the beaten yolks of four fresh eggs, which will immediately give the sauce the consistence of custard; pour it hot over the salad, and place it on ice, or in a very cool larder until it is quite cold: if properly made, it will be very thick and smooth, and slightly set, as if it contained a small portion of isinglass. a dessertspoonful of parsley,β€”or of tarragon,β€”can be mingled with it at pleasure, or any flavour given to it with store-sauces which is liked. It converts flakes of salt-fish, sliced potatoes (new or old), sad hard eggs, into excellent salads.