01 - Preheat oven to 375°F (190°C).
02 - Pat chicken breasts dry with paper towels. Season both sides generously with salt, black pepper, and smoked paprika.
03 - In a large ovenproof skillet over medium-high heat, melt 2 tablespoons of butter. Add the chicken breasts and sear for 3 to 4 minutes per side until golden brown. Remove the chicken and set aside on a plate.
04 - Reduce heat to medium. Add the remaining 2 tablespoons of butter to the skillet. Add the onion, red bell pepper, and garlic. Sauté for 3 to 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 cheddar cheese, Worcestershire sauce, cayenne pepper, and additional smoked paprika if desired. Simmer for 2 to 3 minutes until the sauce thickens slightly.
06 - Return the chicken breasts to the skillet, spooning the sauce generously over the top. Transfer the skillet to the preheated oven and bake for 20 minutes, or until the chicken reaches an internal temperature of 165°F (74°C).
07 - 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.