Culinary Notes
The Silverskin (Elastin): The tenderloin is encased in a tough, white connective tissue called silverskin. Unlike fat, this does not melt when cooked; it tightens into a rubber band. You must remove it with a sharp flexible knife before cooking, or the steak will curl and be unchewable.
The Flavour Paradox: Because it is so lean, Fillet is actually one of the blandest cuts of beef. This is why it is historically paired with rich, high-fat sauces (Béarnaise, Peppercorn) or wrapped in bacon (Filet Mignon) to introduce the fat flavour it is missing.
Raw Consumption: Due to its lack of gristle and soft texture, this is the only cut suitable for Steak Tartare or Carpaccio. When minced or sliced thin, it provides a clean, raw beef flavour without any chewy resistance.
Doneness: It has very little protection against heat. If you cook it past Medium-Rare, it becomes dry, grey, and livery instantly. It relies on water content, not fat, for juiciness.
