Best ways to preserve black truffles, short term

Preserving up to five days:
Place the unwashed truffles in a wodden box, cover them with a slightly damp paper towel, and keep refrigerated. As an alternative, you may also want to wrap the unwashed truffles in aluminium foil or in vacuumed plastic bag, and keep refrigerated. Not washing the truffles until last minute is key to preserve their freshness!

Preserving up to two weeks:
Thoroughly rinse the truffles under a steady stream of water. Clean with a soft brush (a toothbrush is perfect). Allow to dry. Place in a shallow container and fill it with sunflower or peanut oil. Cover them completely. This oil will be truffle flavored and may be used for cooking!