Firm truffles with no signs of blemishes, bruises, or soft spots.
These highly prized mushrooms begin to lose their famous perfume soon after harvest, so pick ones with the strongest scent, an indication of freshness. Truffles also are sold canned, frozen, and in jars. The canned versions are cooked before sealing and have little to no truffle flavor. The cheapest alternative is to use flavored oil. The oils vary in staying power, price, and taste.