Not really, but if you don't have any and don't want to pop for a bottle (it's expensive!) you can use a fresh and flavorful extra virgin olive oil. To achieve the musty mushroom flavor that truffle oil imparts, you can also use a little truffle salt in place of regular salt when you season the dish. Truffle salt can be made at home by pulsing together a little porcini mushroom powder (or any dried mushroom from the store) and salt.