2 Tbsp butter
1/2 cup dark brown sugar
8 cloves garlic, minced
1/3 cup rice wine vinegar
1/4 cup fish sauce
1/4 cup soy sauce
8 skin-on, bone-in chicken thighs
Kosher salt and freshly ground black pepper
1 Tbsp vegetable oil
White rice, for serving
Preheat the oven to 400 degrees.
Melt the butter in a small saucepan over medium-high heat. Add the brown sugar and cook, constantly, until it begins to melt, 2 - 3 minutes. Add the garlic and cook, continuing to stir for another 1 - 2 minutes. Stir in the vinegar, fish sauce and soy sauce. Bring to a low simmer and let cook for about 5 minutes. Remove from the heat.
Use a paper towel to thoroughly pat dry the chicken. Sprinkle both sides with salt and pepper.
Heat a large ovenproof skillet over high heat until very hot. Add the oil. Place the chicken in the skillet skin-side down and let brown without moving it for about 4 minutes. Remove the chicken to a plate and raise the heat to medium-high. Add the brown sugar mixture and use a wooden spoon to scrape up any browned bits. Return the chicken to the skillet skin-side up. Transfer the skillet to the oven and bake, basting the chicken with the sauce midway through cooking, until cooked through, about 20 minutes.
For extra crispy skin, transfer the skillet to the broiler for about 2 minutes.
Serve over with rice with sauce.