Don’t come empty-handed.
Arriving at the door with your hands empty is not a good look. It's not that her parents require a bottle of wine as an entrance fee, or really need that box of eclairs to put up with your company. It's what the action communicates. Bringing anything shows you're making an effort and that their opinion matters to you. It shows you're polite and well-meaning. In other words, it makes an excellent first impression.