Set 24-40 briquettes to fire. Set the cast iron Dutch oven near by to warm as the briquettes fire up.
While the briquettes are heating up, remove the chicken from the marinade and set on a paper towel-lined tray or other clean surface with the skin side up.
Add about a teaspoon of brown sugar per piece of chicken but only on the skin side.
Once the briquettes are done and ready, set the camp cast iron Dutch oven over a bed of hot charcoal briquettes and really heat that cast iron up to a wicked hot temperature.
Add the oil to the pot and let it get very hot. You’ll see whips of smoke from the oil’s surface. Perfect. We need a hot pot that will sear that chicken very well. Six pieces of chicken to the 12-inch Dutch oven will really cool that pot down fast. We need a really hot pot to get a good sear on so many pieces of chicken.
Add the chicken to the pot skin side down. The brown sugar will likely have drawn some of the moisture from the chicken and have “stuck” to the chicken skin. Some of the sugar may fall off during transfer. Don’t worry about it; it’s okay.
Once the skin side is seared and browned, flip each piece over and sear the bone side of the chicken thighs. When both sides are browned, turn each piece skin-side-up.
Once the chicken is seared and browned, remove the pot from the heat. Add the remaining marinade ingredients to the pot and over that chicken. Spread evenly over the chicken and between the pieces of chicken.
Place the lid back on the pot and add 16-18 hot briquettes to the top. Place a ring of 8-10 hot briquettes to the bottom. Let the meal cook until the chicken reached 165°F / 75°C degrees at the bone and the juices flow clear.