Apple sauce is made by cooking down apples with water or apple cider (fresh apple juice) to the desired level. More acidic apples will render a finer purée; the highly acidic Bramley apple is popular for creating a very fine purée. Apples may or may not be peeled; sugar, spices, or lemon juice may be added for flavoring. Apple butter is similar to apple sauce, but has a high cider to apple ratio, of 8 liters to 100 kilograms.[2]