As nouns the difference between parfait and flan
is that
parfait is a french parfait (parfait glacé), an iced dessert made with egg yolks, sugar, cream, and flavouring (usually fruit), sometimes with the addition of a liqueur while
flan is baked tart with sweet or savoury filling in an open-topped pastry case (the only meaning in uk) or
flan can be a fan of us tv series
; a browncoat.