How To Cook Pork Tenderloin On The Grill

ByLily

Grilled pork tenderloin picks up smoky char while remaining succulent inside with careful attention to direct and indirect heat zones. If you want to know how to cook pork tenderloin on the grill without drying it out, the answer comes down to two things: a hot sear and a gentle finish.

This cut is lean and thin, so it cooks fast. That is good news for a weeknight. It also means you have to pay attention, because a few extra minutes can turn juicy meat into shoe leather.

Below is a simple method that works on gas or charcoal. You will get a browned crust, a rosy center, and slices that stay tender.

Why Pork Tenderloin Works So Well On The Grill

Pork tenderloin is long, narrow, and almost free of fat. It weighs about one pound and feeds two to three people. Because it is so lean, it needs high heat for color and lower heat to cook through.

That is why the two-zone setup matters. One side of the grill runs hot. The other side runs cooler. You sear on the hot side, then move the meat to the cool side to finish.

What You Will Need

  • One pork tenderloin, about 1 to 1.25 pounds
  • Olive oil or another neutral oil
  • Salt and black pepper
  • Optional rub: brown sugar, paprika, garlic powder, onion powder, cumin
  • Instant-read thermometer
  • Tongs and a cutting board
  • Aluminum foil for resting

How Long Does It Take

Plan on 20 to 30 minutes total, including resting. Cooking time depends on the thickness of the meat and the heat of your grill. A thermometer is the only reliable way to know when it is done.

How To Cook Pork Tenderloin On The Grill

Follow these steps in order. Do not skip the rest at the end. It lets the juices settle so they stay in the meat instead of running onto the board.

Step 1: Trim And Prep The Meat

Pat the tenderloin dry with paper towels. Look for a silvery membrane called silverskin. Slide a thin knife under it and pull it away. This tough layer will not soften when cooked.

Fold the thin tail end under itself and tie it with kitchen twine if you want even thickness. This small step helps the meat cook at the same rate from end to end.

Step 2: Season It Well

Coat the meat lightly with oil. Season generously with salt and pepper on all sides.

If you want more flavor, mix a dry rub:

  • 1 tablespoon brown sugar
  • 1 teaspoon paprika
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1/2 teaspoon cumin
  • 1/2 teaspoon salt

Rub it over the whole tenderloin. Let it sit at room temperature for 20 to 30 minutes before grilling. Cold meat cooks unevenly.

Step 3: Set Up Two Heat Zones

For a gas grill, turn all burners to high and close the lid for 10 minutes. Then turn off the burners on one side. The off side becomes your indirect zone.

For a charcoal grill, pile lit coals on one half of the grate. Leave the other half empty. Put the lid on and let the grate heat up.

Clean the grates with a brush and oil them with a folded paper towel dipped in oil. This keeps the lean meat from sticking.

Step 4: Sear Over Direct Heat

Place the tenderloin on the hot side of the grill. Close the lid and cook for 2 to 3 minutes.

Turn it a quarter turn to get crosshatch marks. Cook another 2 to 3 minutes.

Flip it and repeat on the other side.

You want a deep brown crust on all sides. This should take 8 to 10 minutes total.

Step 5: Move To Indirect Heat

Slide the tenderloin to the cooler side of the grill. Close the lid.

Cook for 10 to 15 minutes, turning once halfway through. The internal temperature should climb steadily.

Pull the meat when the thickest part reads 140 to 145 degrees Fahrenheit on an instant-read thermometer. The temperature will rise another 5 degrees while it rests.

Temperature Guide

  • 140 to 145 F: juicy with a faint pink center, best for tenderness
  • 150 F: slightly firmer, still fine
  • 160 F and above: dry and tough

Do not rely on time alone. Check the temp early the first time you make this.

Step 6: Rest Before Slicing

Move the tenderloin to a cutting board. Tent it loosely with foil. Let it rest for 5 to 10 minutes.

Slice against the grain into medallions about 1/2 inch thick. Cutting across the muscle fibers keeps each bite tender.

Common Mistakes To Avoid

  • Grilling cold meat straight from the fridge
  • Skipping the two-zone setup and cooking only over high heat
  • Walking away without checking the thermometer
  • Slicing right away and losing the juices
  • Using too much sugar in the rub, which burns before the meat cooks

If your rub has a lot of sugar, sear for less time and finish entirely on the cool side.

Tips For Better Flavor

Try a quick marinade if you have time. A mix of olive oil, soy sauce, garlic, and a squeeze of lemon works well. Thirty minutes to two hours is plenty. Longer than that and the texture can get mushy.

Add a chunk of hardwood like apple or cherry to the coals for extra smoke. On a gas grill, use a smoker box.

Let the meat rest under foil, not tight, so steam can escape. Tight wrapping softens the crust you worked to build.

Serving Ideas

  • Slice over a green salad with vinaigrette
  • Pile into warm tortillas with slaw
  • Serve with grilled vegetables and rice
  • Chill leftovers for sandwiches the next day

Final Thoughts

Pork tenderloin rewards a simple approach. Season it, sear it hot, finish it slow, and stop at 145 degrees. The whole cook takes less time than heating up the oven for a casserole.

Once you get the hang of the two-zone method, you can change the rub, add smoke, or swap in a marinade. The core technique stays the same. Master it once and you will grill this cut all summer.

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