Roast the Porchetta Take the porchetta out of the refrigerator 2 hours before roasting and allow to rest at room temperature. Roast the porchetta for 3 to 3-1/2 hours, until the internal temperature of the pork loin is 140 degrees F. Remove from oven, tent with foil, and increase oven temperature to 500 degrees F.
For this porchetta recipe, you’ll need a 3-4 pound center cut pork loin. It’s important to buy pork loin as opposed to pork tenderloin. The tenderloin cut is better suited to high-temperature, quick-cooking methods than a slow roast. The pork loin will need to be trimmed and “double-butterflied” in order to stuff and roll it.
Remove the porchetta from the oven and turn the temperature to broil. Lift the porchetta on the cooling rack off the baking dish and carefully drain all the fat from the bottom of the baking dish into a heatproof bowl.
For the crispiest skin and fullest-flavored meat, place the porchetta roast on a rack set in a baking pan and refrigerate, uncovered, for up to 2 days. This will really draw out the moisture in the skin, and let the dry rub sink into the meat. Much like my Slow-Roasted Prime Rib, I like to use a reverse-sear method for my porchetta recipe.