A French parfait, also known as parfait glacé, is made with sugar, cream, fruit (often but not always), liqueur (sometimes), and egg yolks. Yogurt is a milk-based item thickened by curdling. It might or might not contain fruit and/or other flavorings. Some of the confusion comes from the way some yogurt products are labeled as being parfaits. Also bear in mind some classic parfait recipes include yogurt as an ingredient! But they aren't the same thing at all. Oh, and the difference between ice cream and parfait is that ice cream is whipped during freezing while parfait I whipped beforehand!