What Is Pork fillet and How Can I Use It?

Pork fillet is easier to cook with than it looks. Here's how to choose, use, and store it, what to substitute, and 7 recipes to get you started.

Key Points

The British name for pork tenderloin, the leanest and most tender cut on the pig.
A different cut from the wider, fattier pork loin, despite the similar name.
Sear then roast or slice into medallions; pull at 145°F (63°C) and rest.
Almost no fat to forgive overcooking, so a thermometer keeps it from going chalky.
Swap pork tenderloin, a pork loin, or chicken breast; trim the silverskin first.

What is pork fillet?

Pork fillet is the British name for pork tenderloin, the long, slim muscle that runs along the inside of the backbone. It is the most tender cut on the pig and one of the leanest.

A whole fillet is a slender log of pale meat that weighs roughly a pound (450 g) and tapers to a thin tail at one end.

Because it does almost no work in the living animal, it has very little fat or connective tissue. That makes it quick to cook and easy to overcook in the same breath.

Treat it well and it is buttery and mild; push it too far and it goes dry and stringy.

This is a different cut from the wider, fattier pork loin, despite the similar name. The fillet is the small inner muscle; the loin is the big roast.

Cooking Pork Fillet

Speed and a watchful eye are the whole job. Sear the fillet hard on all sides to build color, then finish it in a 400°F (200°C) oven, or keep it on the stovetop for medallions.

Pull it at 145°F (63°C) internal and rest it five minutes, when it will still be faintly pink and juicy.

Sliced into rounds, it makes quick medallions or stir-fry strips. Balsamic Pork Stir Fry and Medallions of Pork both work this way, cooking small pieces fast so they never have time to dry out.

It also takes marinades and braises beautifully. Afelia (Braised Pork with Coriander) cubes the fillet and simmers it in wine with crushed coriander seed, while Sweet & Sour Pork (Tiem Shuen Gee Yok) batters and fries bite-size pieces.

Pairing and the One Big Mistake

Mild and lean, the fillet leans on its partners for character. Mustard, apple, sage, fennel, garlic, and warm spices all suit it, and a pan sauce built from the searing fond keeps the lean meat from eating dry.

The one mistake that ruins it is overcooking. There is almost no fat to hide a few extra minutes, so a fillet taken to well-done turns chalky. Use a thermometer, pull it at 145°F (63°C), and rest it. That single habit is the difference between tender and sawdust.

Substitutes

Since pork fillet and pork tenderloin are the same cut under two names, that is your first and best answer if a recipe uses the unfamiliar term. Chicken breast is the closest stand-in for a different protein, lean and quick in the same way.

For a richer, more forgiving result, a boneless pork loin works in roasts and medallions, though it is firmer and needs slightly longer cooking. Avoid swapping in pork shoulder here; its fat and connective tissue need slow heat the fillet never gets.

Buying and Storing Pork Fillet

Look for a firm, pale pink log with a little surface sheen and no gray patches. Some come with a thin silvery membrane, called silverskin, still attached; trim it off before cooking or it shrinks and toughens. One fillet feeds two to three people.

Raw fillet keeps three to four days in the coldest part of the fridge and freezes well for up to three months, tightly wrapped. Because it is lean, it thaws quickly, so plan ahead and defrost it in the fridge rather than at room temperature.

Cooked fillet keeps three to four days refrigerated but reheats poorly, drying out fast under heat. It is far better served cold, sliced thin over a salad or into a sandwich.