Brown Sugar Mustard Pork Loin with Carrots and Rice
September 12, 2026
Simple ingredients, inexpensive sides and enough pork to feed everybody without needing multiple packages of meat. One roast, one pan, and leftovers that make sandwiches on Monday.
Sunday dinner has a low failure rate right up until the moment somebody buys the wrong roast, and then it has a very high one.
This recipe has exactly two things that will decide how it turns out, and the first one happens at the cooler door.
Pork Loin Is Not Pork Tenderloin, and They Sit Next to Each Other
These are two different cuts with names one word apart, packaged similarly, stocked in the same case. People mix them up constantly, and this recipe is unforgiving about it.
A pork loin roast is what this recipe wants. Two to five pounds, wide and thick — usually three or four inches across — often with a fat cap on one side. It comes off the back of the pig and it is built to roast for the better part of an hour.
A pork tenderloin is a pound to a pound and a half, narrow as your forearm, tapered at one end. It is the most tender cut on the animal and it cooks in about twenty-five minutes at this temperature. Put a tenderloin in a 375°F oven for forty-five to sixty minutes and you will pull out something closer to jerky than dinner.
There is a third thing, and it is neither of these: the Boston butt, from the shoulder. That one wants low heat for hours, the way we described in Pork Steak with Onion Gravy and Seasoned Rice. It’s the same primal, cut differently. Three cuts, three methods, one name on the sign.
The Mustard Is Why the Sugar Does Not Burn
A third of a cup of brown sugar goes on this roast at minute zero and stays there for up to an hour at 375°F. That should not work. Sugar starts to darken around 320°F, and an hour is a long time.
What saves it is the two tablespoons of yellow mustard. Mustard brings water and vinegar — the water keeps the sugar in solution rather than letting it dry into a crust that scorches, and the acid measurably slows caramelization. The Worcestershire adds salt and a little more acid on top of that. The mixture is not a paste of sugar with mustard in it; it is a sauce that happens to be sweet, and that is why it can sit on a roast for an hour without going black.
The oven temperature is the other half. Everything else we roast goes at 425°F, and this one deliberately does not. 375°F is the compromise — hot enough to brown the outside of a three-pound roast and color the carrots, cool enough that the glaze survives the whole cook. Do not raise it to speed things up. You will get a burnt shell and a cold center.
The ten-minute rest at step eight is not optional either. A loin roast this size carries enough residual heat to climb several degrees after it leaves the oven, and ten minutes lets the juice redistribute instead of running out the first time you cut it. Slice it early and you will lose it to the cutting board.
Brown Sugar Mustard Pork Loin with Carrots and Rice
Prep Time: 10 minutes
Cook Time: 45–90 minutes
Serves: 4-6
You’ll Need
- 1 pork loin roast
- ⅓ cup brown sugar
- 2 tablespoons yellow mustard
- 1 tablespoon Worcestershire sauce
- 1 teaspoon garlic powder
- 1 lb carrots, cut into chunks
- 2 cups uncooked rice
- 1 tablespoon oil
- Salt
- Pepper
Let’s Cook
- Preheat oven to 375°F.
- Pat the pork loin dry and season with salt and pepper.
- Mix the brown sugar, mustard, Worcestershire sauce and garlic powder.
- Coat the pork loin with the mixture.
- Place the pork in a roasting pan or baking dish.
- Toss the carrots with oil, salt and pepper and arrange them around the pork.
- Roast for 45–90 minutes, depending on the size of the loin, until the center reaches 145°F.
- 2-pound roast: 40 to 50 minutes
- 3-pound roast: 60 to 75 minutes
- 4-pound roast: 75 to 90 minutes
- Remove the pork from the oven and let it rest for 10 minutes before slicing.
- While the pork rests, prepare the rice according to package directions.
- Slice and serve with the roasted carrots and rice.
Simple ingredients, inexpensive sides and enough pork to feed everybody without needing multiple packages of meat.
The Rest of the Sunday Case
Loin roasts come out of whole fresh local pork, cut to the size you ask for. Tell us how many people you are feeding and we will do the math.
If you want the occasion version, there is crab stuffed pork loin already made in the shop, and the homemade cooking case has sides that go straight in the oven beside the roast. Stuffed potatoes are the easy swap for the rice.
Everything is at the meat counter!
Tips from Behind the Counter
- Say “loin roast,” not “pork roast.” Three different cuts answer to “pork roast” and only one of them belongs in this recipe.
- Use a thermometer, not the clock. “45–90 minutes” covers a two-4 pound spread in roast size. 145°F with a three-minute rest is the target; the USDA safe minimum temperature chart confirms it.
- Do not raise the oven temperature. 375°F is deliberately lower than our usual roasting heat because the glaze has to last an hour.
- Give the carrots room. Packed tight around the roast they steam. Spread them to a single layer and they caramelize.
- Rest ten minutes, then slice across the grain. Both matter, and both take no effort.
Ways to Change It Up
- Swap yellow mustard for Dijon or whole grain; the acid still does its job and the flavor gets sharper.
- Add quartered onions and small potatoes to the pan with the carrots and skip the rice entirely.
- Add a pinch of cayenne or a spoon of pepper jelly to the glaze for heat behind the sweetness.
- Use apple cider vinegar in place of the Worcestershire for a brighter, less savory glaze.
- Slice the leftovers thin for sandwiches with slaw! It is the best second day of any roast we sell.
One Stop for Sunday Dinner in Hattiesburg
Family owned and operated in Hattiesburg since 1991. Hours: Monday–Tuesday and Thursday–Saturday, 9:30 a.m. to 5:30 p.m. Closed Wednesday and Sunday. Phone: 601-261-2765. Address: 1910 Broadway Drive, Hattiesburg, MS 39401. Smoked sausage ships nationwide; also on shelves across Mississippi and the Gulf South.
We are closed Sunday, so this is a Saturday purchase. A loin roast keeps well in the refrigerator overnight, and being seasoned a day ahead does it nothing but good.
Want the specials before everyone else does? Text Butcher to 601-281-6633 for the VIP list.