America's Test Kitchen Pork Loin Roast Recipe: Herb-Crusted, Juicy Pink Centers Guaranteed

This America's Test Kitchen pork loin roast recipe delivers foolproof results with juicy pink centers and a perfectly browned crust—no guesswork required. 🔥 After years of perfecting pork roasts in professional kitchens, I’ve adapted their signature techniques for home cooks, ensuring tender meat every time.

The secret? A herb crust that seals in moisture while adding aromatic depth, paired with precise roasting times that guarantee success.

The recipe begins with a simple brine to enhance tenderness, followed by a flavor-packed herb crust made with Dijon mustard, rosemary, and thyme. Roasting at 325°F ensures even cooking without drying out the meat, while a resting period keeps those juices locked inside.

This method transforms a simple pork loin into a showstopping centerpiece that’s restaurant-quality without the fuss.

What makes this recipe truly special is the modern twist on a classic dish—the herb crust adds texture and flavor while maintaining that juicy pink center America’s Test Kitchen is known for.

The pan juices reduce into a rich, savory sauce perfect for drizzling over slices, and complementary sides like roasted potatoes or a crisp salad complete the meal seamlessly.

Whether you're hosting a dinner party or treating your family to a special weeknight meal, this pork loin roast delivers confident results with minimal effort. The techniques are straightforward, the flavors are bold, and the outcome is always impressive. Let’s get cooking!

Ingredients for america's test kitchen pork loin roast

Herb-infused crust meets precision roasting for foolproof restaurant-quality pork loin every time.

The pork loin is non-negotiable here—center-cut with visible marbling ensures maximum tenderness. Whole Foods or high-end butchers carry the best cuts, but most grocery stores stock quality options. Look for a roast with even thickness (about 1.5 inches) to ensure even cooking. If you can't find bone-in, boneless works fine, though the bone helps retain moisture. For brining, Diamond Crystal kosher salt dissolves perfectly—avoid table salt which can leave grainy residue. The sugar in the brine isn't for sweetness but to help the salt penetrate the meat more effectively, creating that signature juicy pink center America's Test Kitchen perfected.

Dijon mustard adds depth without overpowering—Maille brand is my go-to for its smooth texture. Fresh herbs are essential for that aromatic crust, but if you're short on time, dried herbs at one-third the amount work in a pinch (though texture suffers slightly). For the olive oil, California avocado oil has a neutral flavor that won't compete with the herbs. The butter should be cold when mixed into the crust—press it between parchment paper for 10 minutes in the fridge if it's too soft. Garlic can be pre-minced from a jar, but freshly minced adds that extra layer of flavor worth the 30 seconds. If you're making this ahead, prep the crust mixture up to a day in advance and store it in an airtight container in the fridge.

The herb crust keeps best when made fresh, but the prepped ingredients (without butter) can be refrigerated for 24 hours. Once applied to the pork, it's best to roast immediately for maximum adhesion. Leftover roast reheats beautifully—warm slices in a skillet with a splash of pan juices over medium-low heat for 2-3 minutes per side. The pan juices reduce to a glossy sauce perfect for drizzling; store them in a small jar in the fridge for up to 5 days. For make-ahead convenience, roast the pork a day ahead, cool completely, then refrigerate. Reheat covered at 300°F for 20-25 minutes until internal temp reaches 145°F. The resting period is critical—don't skip it, even if you're eager to serve.

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

Master this technique and you'll achieve a perfectly juicy center with crispy herb crust every time.

In a large bowl, combine the 4 cups cold water, 1.5 tbsp kosher salt, and 1 tbsp granulated sugar. Stir until completely dissolved—this creates an even brine that ensures maximum moisture retention in the pork loin. The sugar helps caramelize the crust while balancing the saltiness.

Place the 2 lb pork loin roast in a resealable plastic bag and pour the brine solution over it. Seal the bag and refrigerate for at least 12 hours (up to 24 hours). This long brining period guarantees tender meat with a perfect balance of seasoning throughout. Real talk: don't skip this step—it's what makes the difference between dry and delightfully juicy.

In a food processor, combine the 0.5 cup unsalted butter (cold, cubed), 2 tbsp extra-virgin olive oil, 2 tbsp all-purpose flour, 0.25 cup finely chopped fresh rosemary, 1 tbsp fresh thyme leaves, 4 minced garlic cloves, and 2 tbsp Dijon mustard. Pulse until the mixture forms a coarse, pea-sized crumb texture—this ensures even coating without clumping.

Remove the pork from the brine, pat it dry thoroughly with paper towels (this is critical for crispy crust), and place it on a cutting board. Spoon the herb butter mixture evenly over the entire surface, pressing gently to adhere. Here's the thing—press firmly but don't overwork the meat or it'll release juices prematurely.

Preheat your oven to 375°F. Place the pork loin roast (herb side up) on a wire rack set in a roasting pan. Roast for 45 minutes, then increase the oven temperature to 425°F. This two-stage approach creates a perfect balance of crust development and internal doneness.

Continue roasting for an additional 20-25 minutes until the internal temperature reaches 145°F when measured with a meat thermometer in the thickest part of the roast. The crust should be deep golden brown and crispy, while the internal color remains juicy pink. Watch carefully—pork can go from perfect to overdone quickly at this temperature.

Transfer the roast to a cutting board and tent loosely with aluminum foil. Let it rest for 15 minutes before slicing—this resting period allows the juices to redistribute throughout the meat, ensuring each slice remains moist and flavorful. The crust will stay crispy during this time, so don't worry about it softening.

After resting, slice the pork loin into ½-inch thick portions and garnish each serving with 0.125 cup chopped fresh parsley. The finished roast should have a beautiful golden-brown herb crust that contrasts perfectly with the tender, juicy pink center. Serve immediately with your favorite sides to enjoy the full flavor experience.

Pro cooking tips for great america's test kitchen pork loin roast

Brine Like a Pro

I can’t stress enough how critical the brining step is for this recipe—it’s the foundation of that juicy pink center. Use Diamond Crystal kosher salt (it dissolves better than table salt) and 4 cups cold water for a proper 1:1 ratio.

The sugar isn’t just for flavor; it helps the salt penetrate deeper into the meat. I like to brine my pork for 18-24 hours in the fridge—this gives the meat time to absorb the seasoning evenly.

Pro tip: If you’re short on time, a 4-hour brine still works, but the meat won’t be as tender. Trust me, the difference is noticeable. 💧

Herb Crust Secrets

The herb butter crust is where the magic happens, but getting it right takes a little finesse. Start with cold butter—this ensures it stays firm when you press it onto the pork.

I use a food processor to pulse the ingredients into pea-sized crumbs, which helps the crust adhere better. Press the mixture onto the pork gently but firmly; if you’re too heavy-handed, you’ll squeeze out juices.

For extra adhesion, I sometimes lightly dust the pork with 2 tbsp flour before adding the crust. And here’s a trick I learned from Chef Chen: pat the pork dry with paper towels right before applying the crust—this creates a better seal for that crispy exterior. 🌿

Two-Stage Roasting

This is where America’s Test Kitchen’s method shines. Start at 375°F for 45 minutes to gently cook the pork through, then crank the oven to 425°F for the final 20-25 minutes. This two-stage approach ensures the crust gets crispy while the inside stays juicy.

Use a meat thermometer—pork is done at 145°F internal temperature. If you don’t have one, cut into the thickest part; it should look juicy pink with no gray. Overcooking is the enemy here, so keep a close eye on it, especially in the last 5 minutes. 🌡️

Resting Matters

Skipping the rest is the fastest way to ruin your roast. After removing the pork from the oven, tent it loosely with foil and let it rest for 15 minutes. This allows the juices to redistribute, so every slice stays moist.

I know it’s tempting to slice and serve immediately, but resist! If you’re worried about the crust getting soggy, don’t be—it stays crispy during this time. Pro move: Use this resting period to prep your sides or make gravy from the pan juices. 💡

Slicing for Success

Slice the pork against the grain into ½-inch thick portions for maximum tenderness. I like to use a sharp chef’s knife and cut at a slight angle to make each slice even. Garnish with chopped fresh parsley right before serving to add a pop of color and freshness.

For extra flavor, drizzle the pan juices over the slices—these reduce to a rich, savory sauce that ties everything together. Serve with roasted potatoes or a crisp salad to balance the richness. 🍽️

Frequently asked questions