America's Test Kitchen Pork Tenderloin Recipe: Science-Backed Juiciness Without Drying Out

This America's Test Kitchen pork tenderloin recipe delivers restaurant-quality tenderness every time—no guesswork, no drying out. 🔥 After years of perfecting the science, I've adapted their foolproof method for home cooks, focusing on precise temperature control and resting times that transform tough cuts into melt-in-your-mouth perfection.

The secret? A simple brine and searing technique that locks in juices while creating a caramelized crust you won't find in most recipes.

The key to success lies in three critical steps: brining the pork for 12 hours (no more, no less), searing it over medium-high heat until the internal temperature reaches 145°F, and letting it rest for 10 minutes before slicing.

This method ensures juicy, even cooking throughout while developing that perfect balance of savory and sweet flavors. I've tested this recipe countless times—even with thicker cuts—and it never fails to deliver.

What you'll achieve is pork tenderloin with a golden-brown exterior and tender, moist meat that practically falls apart. The crust is rich and caramelized, while the interior remains perfectly pink and juicy.

This technique works equally well for weeknight dinners or special occasions, and the leftovers reheat beautifully for sandwiches or salads.

Pair with roasted root vegetables, a crisp apple salad, or a tangy mustard sauce for a complete meal. The beauty of this recipe is its versatility—it's simple enough for weeknights but impressive enough for guests. Let's get cooking with confidence!

Ingredients for america's test kitchen pork tenderloin

Precision-crafted ingredients for restaurant-quality pork tenderloin without the guesswork or dryness.

The pork tenderloin cut is critical—look for center-cut pieces with even thickness to ensure consistent cooking. Whole Foods Market or local butchers often carry premium cuts, but standard grocery stores will have suitable options. Avoid pieces with excessive marbling or uneven thickness, as these can lead to inconsistent doneness. For the brine, Diamond Crystal kosher salt dissolves more easily than table salt, creating a more effective solution. If you can't find fresh thyme, dried thyme works at one-third the amount, but fresh provides superior aroma. The sugar in the brine isn't just for sweetness—it helps tenderize the meat while balancing the saltiness.

No fresh thyme? Dried thyme at one-third the amount maintains the flavor profile. Running short on apple cider vinegar? White wine vinegar or lemon juice work equally well for acidity. For the butter, European-style unsalted butter like Plugrá or President melts more cleanly than American brands. The olive oil should be extra-virgin with a peppery finish—something you'd use for dressings. If you're short on time, skip the 12-hour brine but don't go beyond 4 hours maximum, or the meat may absorb too much liquid. The garlic can be roasted at 400°F for 5 minutes before smashing to deepen its flavor without overpowering the pork.

The brine can be made up to 24 hours ahead and stored in the refrigerator—just ensure the pork stays submerged. Fresh herbs should be wrapped in damp paper towels and refrigerated for up to 5 days. Leftover cooked pork tenderloin reheats beautifully—warm in a 300°F oven for 10 minutes with a splash of water or broth to maintain moisture. Portion leftovers into airtight containers for up to 4 days in the fridge or 3 months in the freezer. For best results, slice against the grain before serving to maximize tenderness.

Step-by-step instructions for science-backed pork tenderloin

This method guarantees juicy, perfectly cooked pork every time—no guesswork, just science.

In a large bowl, combine the 4 cups water, 0.5 cup kosher salt, 2 tbsp granulated sugar, 1 tbsp fresh thyme leaves, 1 sprig fresh rosemary, 4 smashed garlic cloves, and 1 tbsp apple cider vinegar. Stir until the salt and sugar fully dissolve—this creates an isotonic brine that penetrates the pork evenly. The sugar helps balance the salt while the vinegar adds subtle acidity that tenderizes the meat.

Place the 1.5 lb pork tenderloin in a gallon-sized zip-top bag and pour the brine over it. Seal the bag and submerge it in a large container of ice water. This cold brine bath ensures even penetration without shocking the meat. Let it brine for 4-6 hours in the refrigerator, turning the bag occasionally. You'll know it's ready when the meat feels slightly firmer and the brine has a rich, aromatic color.

Remove the pork from the brine and pat it dry with paper towels—this step is critical for achieving a crispy crust. Heat 2 tbsp extra-virgin olive oil in a heavy skillet over medium-high heat until shimmering. Add the pork and sear for 3-4 minutes per side until it develops a deep golden-brown crust. Don't move it during this time—resistance is your signal to flip.

While searing, I like to add 2 tbsp cold unsalted butter to the pan during the last minute of cooking. The butter foams and bastes the meat, adding richness and helping create a glossy finish. The high heat caramelizes the surface sugars from the brine, creating that irresistible crust while keeping the interior tender.

Transfer the seared pork to a rimmed baking sheet and preheat your oven to 425°F. Roast the pork for 15-20 minutes until the internal temperature reaches 145°F when measured at the thickest part with a meat thermometer. This temperature ensures the pork is fully cooked but still juicy—overcooking is the enemy of tender pork.

The reason we roast after searing is to develop even heat penetration without drying out the exterior. The residual heat from the sear carries into the oven, creating a perfect carryover effect. You'll know it's done when the meat is firm to the touch and the juices run clear when pierced with a knife. Let it rest for 10 minutes before slicing—this resting period is non-negotiable for juiciness.

After removing the pork from the oven, tent it loosely with aluminum foil and let it rest for 10-15 minutes. This resting period allows the muscle fibers to relax and redistribute the juices throughout the meat. If you skip this step, you'll end up with dry slices—trust the science, not your impatience.

Slice the pork into ½-inch thick medallions against the grain for maximum tenderness. The slices should be moist and juicy with a caramelized crust that's crispy yet yielding. Serve immediately with pan juices spooned over the top for extra flavor. The combination of the brine, sear, and precise roasting temperature guarantees a pork tenderloin that's impossibly tender and never dry.

Pro cooking tips for this dish

Brine Time Mastery

Timing your brine is everything—4-6 hours in the fridge is ideal, but never exceed 12 hours or the meat will absorb too much liquid and become mushy. I use a gallon-sized zip-top bag submerged in ice water for even penetration.

The cold bath prevents the meat from cooking during brining while ensuring the brine reaches every fiber. For extra flavor, add 1 bay leaf or ½ tsp smoked paprika to the brine. 💫

Sear Like a Pro

Your skillet must be ripping hot before adding the pork—medium-high heat is key, not high. I use a cast iron skillet (my Lodge 10.25-inch) because it retains heat perfectly. Pat the pork extra dry with paper towels before searing; moisture steams instead of browns.

For that golden crust, resist the urge to move the pork until you see deep brown spots forming—this takes 3-4 minutes per side.

Butter Basting Hack

During the last 30 seconds of searing, add 2 tbsp cold butter to the pan. The butter will foam and baste the meat automatically, creating a glossy, caramelized finish.

I like to add 1 crushed garlic clove to the butter for extra depth. This step elevates the dish from good to restaurant-quality in seconds. 🔥

Oven Temp Precision

Preheat your oven to exactly 425°F—no higher, no lower. I use an infrared thermometer to verify my oven's accuracy before cooking. The high heat ensures even cooking while preventing the crust from overcooking.

Insert your meat thermometer at the thickest part (avoid the ends) and cook until it hits 145°F internal temperature. Overcooking by even 5°F can dry out the meat.

Resting Technique

This is where most home cooks fail—10-15 minutes of resting is non-negotiable. Tent the pork loosely with foil to keep it warm while allowing steam to escape. The juices redistribute during this time, ensuring each slice is moist and flavorful.

I set a timer and use this time to prep sides—it's the perfect opportunity to let the meat work its magic. 💡

Slice Against the Grain

Use a sharp chef's knife and slice the pork against the grain into ½-inch medallions. The grain runs lengthwise, so you'll need to rotate your cutting board halfway through. This technique shortens the muscle fibers, making each bite tender and easy to chew.

For extra presentation, fan the slices slightly on the plate and drizzle with pan juices. The contrast between the crispy crust and tender interior is what makes this dish unforgettable.

Frequently asked questions