I think these cookies are now my favorite kind of chocolate chip cookies. I like them around this time of year, although to be frank, you could eat these year round. The nutmeg is very present in the flavor, but these are not deeply spiced cookies, so it's not an overwhelming flavor. I just love the white chocolate with the nutmeg; they really compliment each other. The addition of treacle is purely to add an amount of depth to the flavor. You could always use molasses for that, but I absolutely love treacle.