Truffle oil is a cooking oil, reminiscent of olive or sunflower oil, that has been infused with the aroma of white or black truffles. Ever lower right into a pot pie and wished the pure aroma of truffles would exude from it instead of, you already know, fat and flour? Truffles develop due to carbohydrates. Could even work for Chinese New Year festivities, because of the citrus twist. Thanks for sharing this recipe, Sarah! A strong, rustic recipe, employing ingredients with a soil-sure power to harness the wealthy flavors of nature. A minimal-fuss recipe, properly executed.