Preheat oven to 350 degrees
Season the chicken thighs generously with spices and 1 tbsp of flour.
In a hot skillet, melt butter until it sizzles. Sear the seasoned chicken until golden brown on both sides. Once seared, remove the chicken from the pan and set it aside.
In the same pan, sauté finely chopped onions and bell peppers until they are tender and fragrant.
Add 1 tbsp of butter to the pan and sprinkle in additional 3 tbsps flour to create a roux. Stir continuously until the mixture achieves a smooth consistency.
Add Chicken back into the pan, then, add in thyme, rosemary, chicken broth
Bake covered for 20 minutes, then remove some of the cooking liquid from the dish and place inside of a bowl. Mix in equal parts flour, and pour in thick gravy into baked dish.
Continue to bake uncovered for 20 minutes at 375 degrees. Mix well. Serve