Place your Dutch oven on the stovetop over medium-high heat with olive oil.
Add the chopped onions to the dutch oven over medium heat and sauté until they become translucent, about 2-3 minutes. Stir in the minced garlic and cook for another 30 seconds.
Remove the dutch oven from the heat. Add the chicken thighs, brown sugar, salt, pepper, paprika, Worcestershire, mustard, and chicken broth. Stir to combine.
Cover the Dutch oven and place in the preheated oven for 40-50 minutes until the chicken is fully cooked and fall apart tender. Chicken should have an internal temperature of at least 165 degrees.
Place the chicken thighs on a plate and shred chicken using two forks removing any excess fat. Transfer the chicken back to the dutch oven and stir into the sauce.
Optional
Place the dutch oven with the shredded chicken back into the oven and broil on high for 5-10 minutes or until crispy. Before doing this make sure your Dutch oven can withstand temperatures up to 550 degrees.