First, a quick anatomy lesson (don’t worry, it’s painless!). Pork fillet, also called pork tenderloin, is a specific long, thin muscle that runs along the pig’s backbone, tucked right up against the spine. It’s the same muscle that gives us beef tenderloin—and yes, that’s the fancy filet mignon.
What makes it so special? This muscle does almost nothing during the pig’s life. It’s not used for walking, rooting, or running. Because it’s so lazy, it stays incredibly tender and lean. That’s why it’s the most tender cut on the entire animal.
From Farm to Your Frying Pan
Okay, so where does it actually come from on the farm? Imagine a pig, happily snuffling around in a barn or field. That little muscle—about the size of your forearm—is nestled deep inside the loin, right near the ribs. Butchers know exactly where to find it: it’s the long strip that tapers to a point at one end.
When you buy a whole pork fillet, you’re getting the entire muscle, usually weighing between ¾ and 1½ pounds. It’s often sold trimmed of silver skin, that shiny, silvery membrane. This is the only part of the pig that’s as tender as a steak but as lean as chicken breast. Pretty cool, right?
