Don't believe anyone who claims that the distinguished flavour of truffles can be preserved naturally. Unfortunately, it cannot. No matter how much the truffle preserving industry likes to claim this. But in all long-life products, be it truffle oil, truffle honey, preserved truffles in jars or even fresh products such as truffle cheese, artificial flavouring helps to enhance the truffle flavour. With this method of flavouring eggs with truffles, nothing artificial is necessary at all.