1-2 Pound Pork Loin Recipe: Herb-Crusted Roast with Perfect Medium-Rare Core

This 1-2 pound pork loin recipe delivers the perfect medium-rare core every time—juicy, tender, and encased in a fragrant herb crust that seals in all the natural flavors. 🔥 As someone who's roasted thousands of pounds of pork, I know the secret isn't just about temperature—it's about technique: a hot sear, precise timing, and letting the meat rest.

That final step alone transforms good pork into exceptional pork.

The beauty of this method is its versatility—whether you're cooking for a weeknight dinner or a weekend gathering, the same principles apply. We'll start with a simple herb crust (rosemary, thyme, garlic, and Dijon mustard) that adds depth without overpowering the pork's inherent richness.

The key is searing the loin first to create a flavorful crust before finishing it in the oven at a controlled temperature.

What you'll end up with is a perfectly pink center (145°F internal temperature) with a golden-brown crust that's crisp enough to hold its shape. The herbs infuse the meat as it cooks, creating layers of aromatic complexity that make this pork loin unforgettable.

It's the kind of dish that makes you look like a master chef without any fancy shortcuts.

Pair it with roasted root vegetables, a simple red wine reduction, or even just crusty bread to soak up those juices. The leftovers reheat beautifully too—just a quick warm in the oven with a splash of broth.

This is pork loin the way it should be cooked: simple, elegant, and absolutely perfect.

Ingredients for 1 2 pork loin

The secret to perfect pork loin lies in these simple, flavor-packed ingredients—herbs, garlic, and a crisp crust that seals in juices.

The pork loin is non-negotiable here—center-cut, 1-inch thick is ideal for even cooking. Costco or Whole Foods always have great quality, but your local butcher might offer even fresher cuts. Look for bright pink color and good marbling—those little white flecks mean flavor. The herbs? Fresh is non-negotiable—dried just won't give that aromatic punch. I usually buy rosemary and thyme in small bunches and keep them in the fridge until ready to use. The Dijon mustard adds depth without overpowering, so Maille or whole-grain mustard are my go-tos.

No fresh rosemary? Substitute with 1 tbsp dried, but trust me—you'll taste the difference. Short on thyme? Fresh oregano works at the same amount. The red wine can be swapped for beef broth with 1 tbsp balsamic vinegar if you're avoiding alcohol. For the crust, olive oil is essential—vegetable oil won't give that rich flavor. The butter should be cold when mixed—soft butter makes a sad, greasy crust. And if you're wondering about the parsley—it's just for garnish, but it makes the dish look restaurant-worthy.

Let the pork rest 10-15 minutes after cooking—this is where the magic happens. The crust will stay intact, and the juices redistribute. Store leftovers in an airtight container for 3-4 days—reheat gently in the oven with a splash of beef broth to keep it moist. For a crowd, double the recipe, but use a meat thermometer to ensure even cooking. The crust keeps well for 1 week in the fridge if you want to prep ahead.

Step-by-step instructions for herb-crusted pork loin roast

Here's how to create a showstopping herb-crusted pork loin with a juicy medium-rare center and irresistible crust.

In a small bowl, combine the 2 tbsp unsalted butter, 1 tbsp Dijon mustard, 1.5 tsp kosher salt, and 1 tsp freshly ground black pepper. Mix until smooth and creamy—this forms the flavorful base for our crust. In a separate bowl, finely chop the 0.5 cup fresh rosemary and 2 tbsp fresh thyme leaves, then mix with the 6 cloves minced garlic. I like to use my fingers for this—it's more thorough than a knife.

Spread the herb butter mixture evenly over the entire surface of the 1.5 lb pork loin, pressing gently so it adheres. The butter should melt slightly from your hands, helping it stick to the meat. This step creates that signature crust while infusing flavor throughout. Let the pork sit at room temperature for 30 minutes while you preheat the oven—this ensures even cooking.

Preheat your oven to 425°F. Heat a heavy oven-safe skillet (like cast iron) over medium-high heat until smoking hot. Add the 2 tbsp extra-virgin olive oil and swirl to coat the pan. Place the pork loin in the skillet and sear for 3-4 minutes per side until deeply golden brown with crispy edges. You'll see those beautiful caramelized spots forming—that's where all the flavor develops.

Here's the thing—don't move the pork around while searing. Let it develop that crust undisturbed. If it releases easily from the pan, it's ready to flip. I press down gently on the fillet during the first minute to prevent curling. Once seared, transfer the skillet to the preheated oven.

Roast the pork loin for 20-25 minutes for a medium-rare center (130-135°F internal temperature). This is where patience pays off—overcooking is the enemy of juicy pork. I use a meat thermometer inserted into the thickest part (not touching bone) to monitor the temperature. The pork is done when it reaches 130°F—it'll rise to 135°F while resting.

About 10 minutes into roasting, pour the 0.5 cup red wine into the skillet, scraping up any browned bits from the bottom. This deglazing captures all that searing flavor. Then add the 0.5 cup beef broth and continue roasting. The liquid will baste the pork as it cooks, keeping it moist and flavorful.

Remove the pork from the oven and transfer it to a cutting board. Tent loosely with foil and let it rest for 10-15 minutes—this crucial step prevents juices from running out when you slice. During this time, use a pastry brush to baste the pan juices over the pork if desired. The resting temperature will rise to 135-140°F, giving you that perfect medium-rare result.

Before serving, sprinkle the 0.25 cup chopped fresh parsley over the top for a pop of color and freshness. Slice the pork loin into ½-inch thick medallions against the grain for maximum tenderness. Each slice should have that beautiful herb-crusted exterior with juicy pink centers—this is what makes this recipe perfect every time.

Essential equipment for this recipe

Cast Iron Skillet

My go-to for searing pork loin is a 10-inch Lodge cast iron skillet—it retains heat like nothing else and creates that perfect crust. The heavy weight ensures even heat distribution, while the pre-seasoned surface prevents sticking.

I've been using Lodge skillets since my apprenticeship, and they're still my first choice. For budget-friendly alternatives, look for All-Clad stainless steel or Le Creuset Dutch ovens, both of which handle high heat beautifully. 🔥

Meat Thermometer

A thermometer is non-negotiable for perfect pork loin—nothing ruins a good cook like overdone meat. I swear by the ThermoWorks Smoke, which has a remote probe and holds temperature readings. For a more affordable option, the Meater by ChefSteps gives instant, accurate readings.

Always insert the probe into the thickest part of the loin, avoiding bone or fat. The 130-135°F range gives that ideal medium-rare finish.

Oven-Safe Skillet

An oven-safe skillet lets you sear and roast in one pan, minimizing cleanup and maximizing flavor. My All-Clad Stainless Steel 12-inch skillet handles this perfectly—it goes from stovetop to oven seamlessly. If you don't have an oven-safe skillet, transfer the seared pork to a baking sheet lined with parchment paper.

Just be sure to preheat your oven thoroughly to maintain that high heat for proper browning.

Herb Mortar & Pestle

For the herb crust, I use a marble mortar and pestle to finely chop rosemary and thyme—it's more efficient than a knife and releases more flavorful oils. A small food processor works too, but I find it can over-chop delicate herbs.

If you're short on time, a sharp chef's knife with a rocking motion works, but the mortar gives that professional texture. The key is to keep the herbs finely chopped but not pulverized.

Parchment Paper

Line your baking sheet with heavy-duty parchment paper—it prevents the pork from sticking and makes cleanup effortless. I prefer Reynolds Kitchen parchment because it's sturdy and holds up well to high heat.

For extra insurance, I cut the paper to fit the pan with a 1-inch overhang on all sides. This also helps catch any drippings during roasting, which you can use for basting or pan sauces later.

Pastry Brush

A silicone pastry brush is perfect for basting the pork with pan juices or red wine reduction. I use OXO Good Grips because the handle stays cool and the bristles are sturdy. Avoid metal brushes—they can scratch your cookware.

For finishing touches, I also use it to spread a thin layer of garlic-infused olive oil on the crust before serving, adding that final aromatic punch. 💫

Frequently asked questions