Parfait is a Magic: the Gathering deck created by Raphaël Caron (also known as K-Run), a French-Canadian. The deck was originally named "Parfait" because the word means "perfect" in French. Spinoffs have played off the dessert meaning of the word, and decks like "Cherry Parfait" and "Lingonberry Parfait" take advantage of this to point out their color variations. It focuses on removing threats as they are played, while building a fortress to protect yourself. This deck usually wins with the opponent conceding after the lock is in place, rather than wait to run out of cards or be killed by Pegasus tokens generated by the Sacred Mesa. Considered by many to be one of the most annoying decks in Type I today, bringing this deck to a tournament is a sure way to annoy the field.

Here's an example decklist, played by the deck's creator in the Carta Magica Type I event on February 2, 2003.

// Land

    1 Strip Mine
    3 Wasteland
    1 Mountain
    12 Plains
    1 Library of Alexandria

// Artifacts

    1 Tormod's Crypt
    1 Mana Crypt
    1 Mox Pearl
    1 Mox Diamond
    1 Black Lotus
    1 Sol Ring
    2 Claws of Gix
    1 Ivory Tower
    3 Scroll Rack

// Instants

    4 Argivian Find
    3 Orim's Chant
    4 Swords to Plowshares
    1 Enlightened Tutor

// Sorceries

    1 Replenish
    2 Wrath of God
    1 Balance

// Enchantments

    2 Sacred Mesa
    1 Blood Moon
    1 Seal of Cleansing
    2 Aura of Silence
    2 Humility
    2 Story Circle
    4 Land Tax

// Sideboard

SB: 1 Replenish
SB: 1 Phyrexian Processor
SB: 1 Jester's Cap
SB: 1 Moat
SB: 1 Cleansing Meditation
SB: 2 Pariah
SB: 1 Ivory Tower
SB: 1 Orim's Chant
SB: 2 Tormod's Crypt
SB: 2 Aura of Silence
SB: 1 Grindstone
SB: 1 Karmic Justice

Land Tax/Scroll Rack: Used to "draw" 3 extra cards per Land Tax, per turn. A Zuran Orb makes sure that you always have fewer lands than your opponent.
This deck can conceivably maintain a lock forever, by using Scroll Rack to put more cards on top of the library than are in your hand.
This decktype often runs Soldevi Digger for recursion purposes, allowing important cards to be added back to the library while unneeded ones sit in the graveyard, although Raphaël himself has removed the card, since the long game is no longer much of an issue in a tournament environment where matches are limited to 50 minutes.