Brined and Grilled Pork Loin Roast

July 6, 2009

If you have never brined your meats before cooking, you don't know what juicy and tender is all about! Brining is the trick many professional cooks use to produce tender and juicy meats. I first tried brining with my last Thanksgiving turkey and I felt like immediately calling every former Thanksgiving guest to apologize for cheating them on past turkeys. Well this week, I wanted to cook a pork loin roast on the grill. Pork loin is very lean and lean meats have a tendency to dry out if not cooked properly. To counter-act this tendency, I decided the roast would be a good candidate for brining. I am so glad I decided to brine this pork loin roast because the result was awesome! Most of our simple grilling recipes don't require a lot of prep time, but this one requires a little more planning. Plan on at least 12 hours of brining, overnight and up to 24 hours is optimal. Trust me on this one though, it is worth it!

What is brining?
Brining is the unsung hero of meat cooking, in my opinion. The actual brining process is similar to marinating. Both processes submerge the meat in a solution and allow is to absorb for some period of time. Unlike marinating though, brining actually packs the cells of the meat full of moisture. In other words, brining actually hydrates the meat. We all know that the opposite of hydration is dehydration, which unless we are making jerky, is a griller's worst nightmare! The result is an extra juicy and extra tender hunk of meat!

The most common and most important component of brining is salt. In many cases brown sugar is also used to offset some of the saltiness of the brine solution. Once you have the main components (salt, water and sugar), you can pretty much throw any herb in there you want. Here's my basic brining solution (good for about a 4 pound pork loin roast in this case):

  • Prep: 1 hr
  • Cook: 1 hr 30 mins
  • Yields: 6 Servings


4 - 5 pound pork loin roast (ask the butcher, you want the nice fat layer on the top as well!)

6 cups water

1/2 cup salt

1/2 cup Dark Brown Sugar

2 Bay leaves

1 handful of peppercorns

4 sprigs of Thyme

2 sprigs of Rosemary


1Combine the brown sugar and salt in the water and bring to a boil.

2Stir until dissolved and then add the rest of the brine ingredients.

3Lower heat and simmer for about 5 minutes.

4Turn off the heat and allow to cool completely to room temperature.

5Once the solution has completely cooled (we don't want to start cooking the meat!), add the pork loin roast and brine solution to a Ziplock type bag. Seal and squeeze out as much air as possible.

6Put the sealed bag with the now brining pork roast into a pot or large bowl, one that can hold all of the liquid in case something happens to the bag (speaking from experience here!). Place the bowl containing the brining meat into a refrigerator for at least 12 hours, up to 24 hours.

How to Cook a Pork Loin Roast on a Gas Grill:

1Ok, so now we know about brining and we have soaked that pork loin roast in the brining solution for at least 12 hours. It's time to start thinking about how to cook this bad boy on the grill. Given the fact that these roasts are a little on the large side, we definitely want to cook them over indirect heat for a longer amount of time. The process of roasting a pork loin on the grill is similar to roasting one in the oven, except for the smoke! So don't forget about the smoke pouches for this one! Let's take a look at the process in detail:

2Remove the pork roast from the refrigerator at least 45 minute prior to cooking. We want to give it a little time to warm to room temperature, so remove it from the brining solution and leave it on a platter on the kitchen counter while we prep the grill and smoke pouches.

3Prepare at least 2 smoke pouches worth of wood chips by soaking them in water for about 30 minutes. Once soaked, form the smoke pouches as detailed in this article.

4After about 45 minutes, rinse and pat the pork roast dry.

5Rub the pork loin with fresh ground black pepper.

6Light the grill to high.

7Once the grill is heated up, add the smoke pouches to the sides of the grill so they can start to smolder.

8Sear the pork loin roast on all sides and create some of those nice grill marks that make us look like we know what we are doing!

grilled pork loin roast

1Once the pork roast is seared, turn off the middle burner(s) on your grill to prepare for indirect grilling.

pork loin roast

1We want to elevate the pork roast a little so that we can place a drip pan underneath. If you are able to fit one under the grates, go ahead and do so. My grill doesn't have a separate middle grate, so I use a rack (from a roasting pan) to elevate the roast. As you'll notice in the photo, I didn't have an aluminum drip pan so I made one out of aluminum foil :).

2Place the seared pork loin on the grate (or rack) fat side up! Roasting meats fat side up also aides in keeping them juicy!

3We have mentioned this before, but don't trust your grill's built in thermometer. We want to roast this pork loin at around 300 degrees, so go ahead and place the thermometer right next to the pork loin on the grill.

4Now close the lid and your job is done for at least an hour! Make sure you monitor the thermometer for the first 20 minutes or so to get the temperature right. Adjust the "on" burners to get the thermometer to 300 degrees. Also, keep an eye on the smoke pouches and add more if needed to keep that smoke going!

5After about an hour, insert a meat thermometer into the thickest part of the roast and then close the lid.

6Continue cooking until the meat thermometer measures around 150 degrees.  This is where a good instant read meat thermometer in invaluable.  Don't use one of those metal dial thermometers, treat yourself to the highly accurate and splash-proof Thermapen.  It will last you a lifetime and never needs calibrated.  I must have for cooking and grilling.  Get it here.  If you are an iPhone owner, check out our free MeatTemps reference app that allows you to easily look up the proper internal temperatures for meat.

7Remove the pork loin roast from the grill, place on a platter and cover with a tent of aluminum foil and allow to rest for about 15 minutes before carving.

I have done my share of grilling pork; including BBQ ribs, tenderloins and anything else that can be found on a pig.  I seriously do not recall ever eating a more delicious pork roast. The brining definitely kicked up the juiciness and tenderness of the pork loin. Taking the time to cook the pork slow over smoke adds just that much more flavor to this grill recipe. I made a lot in this case and I was happy to eat pork leftovers for about a week. I had sandwiches and even pork quesadillas and was upset to come home and find that my wife had thrown the rest of the roast away. I know it was getting old, I just didn't want to let go!


7 Reviews

Scott Wilding

August 24, 2019

I am brining a pork loin tonight using your recipe.
I will cook it tomorrow on a gas grill.
So many great reviews here.
instead of a brown sugar base, I am using peace preserves.
I will re-post after.


October 22, 2017

I have made this recipe about 5 times over the past year and it is amazing every time it’s unfortunate that the roast in the picture is very over done and does not really show how moist and juicy pork can be.

Erin Wood

September 4, 2017

This is hands down the best pork loin I have ever made! I changed up the brine a little and soaked it forn2 days. It came out juicy and salty and delicious! 5 thumbs up!


March 24, 2016

Best info yet! Makes sense from about of a 100 recipes/vids that I have looked at. Combines all of what I plan on doing for this Good Friday. I have two 5lb center cuts with fat caps. Should I adjust the time with two loins? (Double) I’ll check temps but just wondering. It’s my first time for 15 ppl or so. Plus I’m using charcoal grill. Any help would be appreciated. Nice work brotha


January 11, 2016

I slightly deviated from this recipe and only used Kosher salt in the brine, where it sat for 16 hours, and used fresh cracked peppercorns just prior to grilling it. My grill isn’t working 100% so it worked out really good to not need direct heat; I was able to use the searing burner to sear it and then left it on high with the mesquite chips over the flame and maintained a temp of about 250-300 for about 3 hours. my 4 lb pork loin was absolutely the best we’d ever had. Definitely some things I want to try/add next time, but this was a great 1st attempt. Thank you for this recipe and the instructions! This is definitely the way to do it! And I’ll be trying chicken and turkey next!


December 7, 2015

Made this brine and marinated 24 hours, then used dijon/herb grill recipe from this site, and everyone RAVED! Best pork roast ever! It was even a bone in pork butt and it still came out so juicy and tender with a beautiful yummy crust! Thanx for this recipe it is wonderful! It gets 5 stars from this family!


November 24, 2015

Great sandwiches for the week.

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