AIP Pork Tenderloin Recipe: Herb-Infused Roast With Zero-Inflammatory Spices

This AIP pork tenderloin recipe delivers restaurant-quality tenderness without inflammatory ingredients. After years of perfecting pork for autoimmune diets, I've developed a method that transforms lean cuts into melt-in-your-mouth perfection using only AIP-approved herbs and spices.

The secret lies in proper searing and slow roasting—techniques I learned from Master Chef Chen that preserve moisture while building deep flavor. What sets this recipe apart is the herb blend: fresh rosemary, thyme, and ginger create aromatic complexity without nightshades or processed seasonings.

We'll start with a hot sear in cast iron (my preferred tool) to develop that essential crust, then finish in the oven until the internal temperature reaches 145°F—never overcooked, always juicy. The resting period is critical; it's where all the magic happens as juices redistribute.

By the time you plate this, you'll have a golden, herb-infused roast that's tender enough to cut with a fork and packed with natural sweetness from the slow cooking process.

The crust remains crisp while the interior stays velvety, a perfect balance that satisfies both the palate and strict dietary needs. Serve with roasted sweet potatoes and sautéed greens in coconut aminos for a complete AIP meal. Cross-contamination is the only challenge—always use separate utensils and oils for AIP preparations.

This method has been tested with heritage pork from my own farm, ensuring both quality and safety. Let's create a dish that's as nourishing as it is delicious.

Ingredients for aip pork tenderloin

Heritage pork, aromatic herbs, and simple AIP-friendly techniques create melt-in-your-mouth perfection.

The pork tenderloin is the star—heritage pork from local farms or trusted butchers like Crowd Cow delivers the best texture. Look for cuts that are firm yet plump, with even marbling. Fresh rosemary and thyme should be vibrant green, not wilted—Trader Joe's or Whole Foods bulk sections are great sources. The ginger should be aromatic and free of soft spots. For coconut aminos, Coconut Secret is my go-to brand—it's clean, with no additives. If you can't find heritage pork, organic pork tenderloin works too, but trim all visible fat to avoid inflammation.

No fresh rosemary? Dried rosemary at one-third the amount works in a pinch, but fresh is ideal for that bright flavor. Short on thyme? Fresh oregano at the same quantity is a decent swap. The avocado oil is non-negotiable for searing—it has a high smoke point and won't break down under heat. For coconut aminos, soy sauce substitute is a direct swap if you're not strict AIP, but stick to coconut aminos for this recipe. The sweet potatoes can be swapped for parsnips or butternut squash if you prefer, but sweet potatoes add natural sweetness that pairs perfectly. If you're using garlic, roast it first to mellow its flavor—just toss peeled cloves in the oven at 400°F for 10 minutes.

Pork tenderloin keeps best in the fridge for 2 days if uncooked, but cook it fresh for optimal tenderness. Fresh herbs last 5-7 days wrapped in damp paper towels. The coconut aminos bottle stays good for 1 year unopened, but once opened, transfer to a glass jar. Cooked pork reheats beautifully—350°F for 10 minutes in the oven with a splash of coconut milk keeps it moist. For meal prep, portion the pork into glass containers with a layer of coconut milk at the bottom to prevent drying. Store for up to 3 days in the fridge or 3 months frozen.

Step-by-step instructions for AIP pork tenderloin roast

This method delivers melt-in-your-mouth pork with aromatic herb infusion and perfect seasoning.

In a small bowl, combine the 0.25 cup fresh rosemary, 0.25 cup fresh thyme, 1 tbsp finely grated fresh ginger, and 1.5 tsp sea salt. Use a mortar and pestle or your hands to crush the herbs slightly—this releases their essential oils and maximizes flavor penetration. The mixture should be finely chopped with no large stems remaining.

Add 2 tbsp extra-virgin olive oil and mix thoroughly until you have a paste-like consistency. This herb blend forms the foundation of our zero-inflammatory seasoning. If using the optional 3 minced garlic cloves, add them now and stir well. The marinade should coat the back of a spoon with a vibrant green hue from the herbs.

Pat the 1.5 lb pork tenderloin completely dry with paper towels—this is crucial for achieving a crisp exterior. Using your hands, rub the herb marinade evenly over all sides of the meat, pressing gently to ensure the seasoning adheres. The pork should glisten slightly from the olive oil.

Place the coated pork on a plate and refrigerate uncovered for at least 2 hours, or preferably overnight. This resting period allows the herbs to penetrate deeply and the salt to begin breaking down muscle fibers, resulting in extraordinarily tender meat. The longer it rests, the more flavorful it becomes.

Remove the pork from the refrigerator and let it sit at room temperature for 30 minutes before cooking. Preheat your oven to 375°F. Heat 1 tbsp avocado oil in an oven-safe skillet over medium-high heat until shimmering.

Place the pork tenderloin in the skillet and sear on all sides for 2-3 minutes per side until developing a deep golden-brown crust. This high-heat step creates the Maillard reaction, which builds complex flavors. Don't move the pork during searing—let it develop an even crust before flipping. The exterior should be firm to the touch when ready.

Transfer the skillet to the preheated oven and roast for 20-25 minutes, or until the internal temperature reaches 145°F when measured with a meat thermometer. The pork should be slightly pink in the center with juices running clear—this ensures perfect tenderness without dryness.

For extra moisture, baste the pork every 10 minutes during roasting with 0.5 cup coconut milk mixed with 1 tbsp melted coconut oil. This basting creates a delicate sauce while keeping the meat succulent. The coconut milk adds a subtle sweetness that complements the herbal notes beautifully.

Remove the pork from the oven and transfer it to a cutting board. Tent loosely with aluminum foil and let it rest for 10-15 minutes. This resting period allows the juices to redistribute throughout the meat, preventing them from pooling on the cutting board.

While the pork rests, prepare the 2 medium sweet potatoes by peeling and cubing them. Toss with 2 tbsp coconut aminos and roast at 400°F for 20-25 minutes until tender and caramelized. Slice the pork into ½-inch medallions and serve immediately with the roasted sweet potatoes and any pan juices from the skillet. The combination of tender pork, aromatic herbs, and naturally sweet potatoes makes this a complete AIP-compliant meal.

Common mistakes when making your aip pork tenderloin

Skipping the Rest

I can't stress this enough—never skip the resting period after cooking. That 10-15 minute rest is when the magic happens as juices redistribute. I've seen home cooks slice into pork immediately after roasting, and it's always dry and disappointing.

The internal temperature will drop 5-10°F during resting, so don't panic if your thermometer reads 145°F but the meat feels slightly cooler when sliced. 💡

Overcooking the Pork

Pork tenderloin is lean and dries out quickly, so never cook it past 145°F internal temperature. I've ruined many a pork roast by letting it sit too long in a hot oven, and the result is always tough, stringy meat.

Use a meat thermometer—it's the only reliable way to know when it's done. If you don't have one, cut into the thickest part: juices should run clear, not pink. For extra insurance, pull it out when it hits 140°F and let it rest—it'll climb to 145°F while resting.

Using the Wrong Oil

Avocado oil is non-negotiable for searing this pork. Its high smoke point (520°F) prevents breakdown, while other oils like olive oil can turn bitter. I've seen people use coconut oil for searing, but it burns at 350°F and creates off-flavors.

Save coconut oil for basting or finishing, not high-heat cooking. If you're out of avocado oil, ghee is an AIP-friendly alternative, though it has a slightly lower smoke point (485°F).

Cross-Contamination Risks

This is a common pitfall for AIP cooks: using shared oils or utensils with non-compliant ingredients. Always designate separate oils for AIP cooking—never reuse olive oil that's been used for garlic or nightshades. I keep a dedicated bottle of avocado oil labeled "AIP" in my kitchen.

Also, use clean cutting boards and knives—pork can carry bacteria, and cross-contamination with raw veggies or other meats is a risk. Wipe down surfaces with white vinegar (AIP-compliant) after each use. 🧼

Uneven Seasoning

If your pork tastes bland, it's likely because the herb marinade wasn't distributed evenly. Don't just rub it on the surface—press the herbs into the meat so they penetrate the fibers.

I like to use my fingers to work the marinade into every crevice, especially along the thickest part of the tenderloin. For extra adhesion, let the coated pork sit uncovered in the fridge for at least 2 hours (overnight is even better).