01 - Preheat oven to 375°F (190°C).
02 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, freshly ground black pepper, and smoked paprika.
03 - In a large ovenproof skillet over medium-high heat, melt 2 tablespoons of butter. Sear chicken breasts for 3–4 minutes per side until a golden-brown crust forms. Remove and set aside on a plate.
04 - Reduce heat to medium. Add the remaining 2 tablespoons of butter to the skillet. Sauté the chopped onion, diced red bell pepper, and minced garlic for 3–4 minutes until softened and fragrant.
05 - Deglaze the skillet with chicken broth, scraping up any browned bits from the bottom. Stir in the heavy cream, shredded sharp cheddar cheese, Worcestershire sauce, cayenne pepper, and additional smoked paprika if desired. Simmer for 2–3 minutes until the sauce thickens slightly.
06 - Nestle the seared chicken breasts back into the skillet, spooning the sauce generously over the top of each piece.
07 - Transfer the skillet to the preheated oven. Bake for 20 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and is cooked through.
08 - Remove from the oven and let rest for 5 minutes. Garnish with sliced green onions and chopped fresh parsley. Serve alongside rice, mashed potatoes, or cornbread.