Why It Works
- Curing the pork for two days enhances the texture of the meat and improves moisture retention.
- Marinating the meat seasons the exterior of the roast and adds sugar, which enhances browning.
- Roasting in a low oven offers superior control over the doneness of the meat.
Though chashu, the sliced roasted or braised pork used as a topping for ramen, is most often associated with pork belly in the United States, you can make an equally tasty version from pork shoulder, which has the added benefits of being a meatier cut that's relatively cheap and widely accessible for home cooks.
You can braise shoulder just as the belly is braised in Kenji's chashu recipe, but if you, like me, prefer your meat to retain a little bite, you can also roast it. One of the best ways we've found to roast meats is using the reverse-sear method, which gives the cook a great deal of control over what temperature the pork shoulder is cooked to. (If you want complete control over the final temperature, and have the necessary equipment, try our recipe for sous vide pork shoulder chashu instead.)
This recipe recommends cooking the pork to 145°F (63°C), but you can cook it to any temperature you like. No matter your preference, a reliable instant-read thermometer is essential for monitoring the internal temperature of the roast, and a probe thermometer is highly recommended.
- 1/2 ounce (14g) kosher salt (see note)
- 1/2 ounce (14g) granulated sugar (see note)
- 1 pork shoulder roast (about 2 pounds; 900g)
- 1 tablespoon (15ml) soy sauce
- 1 tablespoon (15ml) mirin
Combine salt and sugar in a small bowl and mix thoroughly.
Place pork shoulder roast in a zip-top bag. Pour salt-sugar mixture into bag and massage mixture evenly into meat. Seal bag, trying to avoid leaving much air inside.
Place bag in refrigerator for 24 hours. Roughly every 8 hours, massage bag and flip it over to ensure even distribution of the cure.
Open bag and add soy sauce and mirin. Seal bag and massage meat again to ensure even distribution of brine and marinade. Place in refrigerator for another 24 hours, massaging bag and flipping it roughly every 8 hours.
Adjust oven rack to middle position and preheat oven to 200°F (93°C). Set a wire rack in a rimmed baking sheet large enough to comfortably accommodate the roast.
Remove roast from bag and blot completely dry. Using kitchen twine, tie at 1/2-inch intervals to form a neat cylinder. Place roast on rack set in rimmed baking sheet. If using a probe thermometer, insert in center of roast. Place roast in oven and cook until internal temperature registers 145°F (63°C), or the temperature of your choosing, about 3 to 4 hours. Remove roast from oven.
If Finishing Under the Broiler: Adjust oven rack so that the roast will be about 1 inch away from the broiler element. Preheat broiler to high. When broiler is hot, place roast, still on its rack in the rimmed baking sheet, under broiler, turning frequently, until exterior is charred, about 5 minutes.
If Finishing With a Handheld Torch: Turn on torch and char exterior of roast on all sides.
The roast can immediately be sliced very thinly and served on top of ramen. Alternatively, the roast can be chilled before slicing, which facilitates slicing it thinly. To chill, allow roast to cool to room temperature, then wrap tightly in plastic and place in refrigerator for 6 hours or overnight. Or, seal the roast in a vacuum-sealed bag or in a zip-top bag using the water-displacement method, then place sealed roast in an ice bath to rapidly chill.
The amount of salt-sugar cure should be adjusted if you're using a pork roast that is slightly larger or slightly smaller than 2 pounds. Use 3% of the weight of the pork roast in salt-sugar cure mixture.
Make-Ahead and Storage
The pork shoulder roast is best made 1 day prior to serving and will keep for about 3 days in the fridge. The roast can also be sliced for freezing in individual portions, but its quality will suffer.