It is called #Fatblooming. If chocolate is not properly tempered than this kind of white spots can be seen. In this case fat separation happened and due to this white spots obserevd . read more
Rub your hands over the white spots.If you feel it greasy then it is fat bloom.If you feel it grainy then it is sugar bloom. It will change the appearance of the chocolate but does not change the eating quality in any way. read more