Typically pork tenderloins come two to a package, however I have seen them sold individually. Remove the pork from the package and place on a cutting board with the silver skin facing up.
With a very sharp boning knife, or similar shaped knife, remove silver skin by sliding the knife tip under one end of the silver skin. Keep the blade flat (parallel to the meat) and slide the knife between the meat and the silver skin, pulling up on the silver skin as you go. Discard silver skin. Also remove any excess fat if any.
Preheat oven to 375 degrees F.
Jack was always taught to oil the meat not the pan (which is maybe why Martha got the fire department involved all those years ago) so after trimming the meat, brush it all over with a generous amount of olive oil, then sprinkle with kosher salt, black pepper and optional garlic powder.
Heat a large oven proof skillet or fry pan over high heat until smoking hot. Drop a few drops of water in and if they instantly evaporate, the pan is ready.
Carefully place the tenderloin in the pan and don’t move it for 1 ½ minutes. Then turn it totally over and cook 1 ½ more minutes. Turn a quarter turn and cook for another 1 ½ minutes. Turn it to cook the last side then take the whole pan and place in the pre-heated oven.
Depending on the size of the tenderloin, it should take between 10 and 15 minutes. If small, test after 10 minutes by poking the fattest part. If you make a loose fist and push on the fatty part of your palm just below your thumb, it should feel like that. If it doesn’t bounce back, leave it in the oven for up to five more minutes.
The cooking time is not an exact science so using a probe thermometeris a must. After the allotted time, insert a probe thermometer into the thickest part of the meat and check the temperature. For medium rare, remove the tenderloin at 135 degrees F. For medium to medium well, remove between 135 degrees F and 140 degrees F. The pork will continue to cook for about 10 more degrees outside of the oven and will stop cooking after that. Our 1 ½ pound pork tenderloin was removed from the oven at the 14 minute mark at 135 degrees F and stopped cooking at 147 degrees F. The meat was slightly pink but not rare.
Once out of the oven, place on a cutting board and loosely tent with foil. To retain the juices and raise to at least the recommended US department of agriculture cooking temperature of 145 degrees F, it must rest between 5 and 10 minutes. We let ours rest ten minutes but I checked the temperature after five. At the five minute mark for resting, the temperature climbed from 135 to 147. At ten minutes it was still at 147. At 15 minutes it had dropped to 143. So optimally, you should be carving it no sooner than five but no later than ten minutes.
Carve into thick slices and serve with your favorite pan sauce.
To make a quick pan sauce, after removing pork from fry pan, place pan over burner and add ¼ cup white wine to deglaze. Once the wine is down to a few tablespoons, add two tablespoons of cold butter and remove pan from heat. Stir butter in until it melts then stir and serve over pork slices.
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