Season the Chicken:Pat chicken dry and season both sides with salt, pepper, garlic powder, onion powder, and paprika.
Sear the Chicken:Heat oil in a large skillet over medium heat. Sear chicken on both sides until golden brown, about 4–5 minutes per side. Remove and set aside.
Cook Onions and Garlic:In the same pan, add sliced onions. Sauté until soft and caramelized, about 5–6 minutes. Add garlic and cook 1 more minute.
Make the Gravy:Sprinkle flour over the onions and stir to coat. Slowly pour in chicken broth, whisking constantly to avoid lumps. Add heavy cream and Worcestershire sauce. Simmer until thickened, about 4–5 minutes.
Smother the Chicken:Return the chicken to the skillet. Spoon gravy over the top. Cover and let simmer for 15–20 minutes, or until chicken is cooked through (internal temp 165°F).
Serve:Garnish with parsley if desired. Serve hot over rice, mashed potatoes, or grits.