A chattybian is the name given to a piece that is double-cut from the middle of the tenderloin. Pink or little bloody cooked is acceptable.

The piece, cut to a thickness of about 4 cm, has a range from 400 to 600 g. It is named after the French writer and politician François-René de Chateaubriand (1768–1848).

The service is for two people. It is served on pink or less bloody cooked cooked meat with spicy butter, Tere or Sauce béarnaise and garnished with potatoes.

According to the Laousse Gastronomic book, this recipe was found by Chateaubriand Brain cook during the years when the author lived in London.

There is no exact information proving that it may be in an urban legend.