white truffles means: Truffles are quite expensive. They are only available in some areas in late autumn. You won’t believe the cost per pound, but a lot goes a long ways. You must try them if you haven’t already. It is impossible to find a mushroom with the same flavor or aroma as white truffles. White truffles, which are delicater and should be eaten right away from the table, are better. To bring out the truffle’s flavor, you can either use a grater (or a truffle shredder) to do so immediately. White truffles go well with buttery and creamy sauces like risotto or other pastas. These shavings are also great for warm salads or delicate fish. (in Cooking Dictionary)