Cut hardboiled eggs in half lengthwise. Carefully scoop out the yolk and set whites aside for the moment. Mash together yolks, truffle oil, pepper, salt, cayenne, mayonnaise, and lemon juice in a bowl with a fork.
Fill egg white halves with the yolk filling and top with freshly chopped chives and a sprinkle of cayenne. Serve immediately or cover with plastic wrap and chill in refrigerator until ready to serve.