Before I actually knew that there was a difference between a pork loin and a pork tenderloin, I messed this up a lot. Turns out, these are two completely different cuts of meat!  A pork tenderloin is a long and thin piece of meat. It comes from the muscle that runs along the backbone of the pig.  Pork loin, on the other hand, is smaller and flatter. This cut of meat comes from the back of the animal.  For this recipe, you’re going to need a pork LOIN (AKA the smaller, flatter cut of pork). Make sure to get the right kind so that the cooking instructions work correctly!