Season the chicken thighs generously on both sides with paprika, garlic powder, salt, and pepper.
Melt the butter in a large oven-safe skillet over medium-high heat. Sear the chicken thighs skin-side down for 4-5 minutes until golden brown. Flip and sear for another 3 minutes. Remove and set aside.
In the same skillet, add the diced onion and cook for 3-4 minutes until softened. Add the minced garlic and cook for 30 seconds until fragrant.
Sprinkle the flour over the onions and garlic, stirring constantly for about 1 minute to form a roux.
Slowly pour in the chicken broth while whisking continuously to prevent lumps. Stir in the heavy cream and bring to a simmer.
Nestle the seared chicken thighs back into the gravy. Cover, reduce heat to medium-low, and simmer for 25-30 minutes until the chicken reaches an internal temperature of 165°F (74°C) and the gravy has thickened.
Serve the smothered chicken and gravy over fluffy white rice. Garnish with fresh chopped parsley.