Anise oil is a popular flavoring for Holiday baking, especially for cookies, anise is one main ingredient in making Biscotti.
Don't be alarmed if anise oil has crystallized or congealed. Simply warm the anise oil until it is liquified and shake. The congealing point of oil of anise is 15 degrees C or 59 degrees F. The congealing or crystallization of oil of anise is a criterion of value. In other words, if cystallization takes place at 15 degrees C, it is your assurance of good value anise.