Preheat oven to 350℉ (180℃).
In a small bowl, mix the onion powder, garlic powder, salt, pepper, and paprika.
Pat your chicken thighs dry with a paper towel and then season thoroughly with the spice mix.
Heat the oil over medium-high heat in a large cast iron or Dutch oven. Brown the chicken thighs in the hot oil, turning to brown on all sides. Remove and set aside.
Add the butter to the pan. Once the butter melts, add your onions, garlic, and thyme and saute for 2-3 minutes or until fragrant.
Next, add the diced tomatoes and bouillon powder. Cook for 5-6 minutes.
Gradually pour in your white wine, followed by the chicken broth. Stir and bring to a boil, then add in your carrots and celery.
Cook for about a minute; adjust seasonings to taste.
Next, return the browned chicken thighs to the pan, cover them with a lid, and place them in the oven.
Let it braise in the oven for 40 minutes or until the chicken is tender and the internal temperature reaches 165ºF (75ºC). You can remove the lid in the last five minutes and broil the chicken for a nice brown color.
Take it out of the oven and let it cool. Then garnish with parsley.
Serve with your favorite veggies, mashed potatoes, or rice.