01 - Preheat your oven to 400°F. Lightly grease a baking dish with cooking spray or a small amount of olive oil.
02 - In a medium bowl, combine cream cheese, mozzarella cheese, cheddar cheese, parsley, thyme, garlic powder, onion powder, salt, and pepper. Mix until completely smooth and evenly incorporated.
03 - Place chicken breasts on a cutting board. Using a sharp knife, carefully cut a horizontal pocket into the thickest part of each breast, stopping before cutting completely through to create an opening for the filling.
04 - Divide cheese mixture evenly among the four chicken breasts, gently pressing filling into each pocket. Secure openings with toothpicks if necessary to prevent filling from escaping during baking.
05 - Brush the exterior of each stuffed chicken breast with olive oil. Sprinkle evenly with salt, black pepper, and paprika, coating all sides.
06 - Place stuffed chicken breasts in the prepared baking dish, leaving slight space between each piece for even heat circulation.
07 - Bake for 30–35 minutes, or until chicken reaches an internal temperature of 165°F and tops are golden brown. The filling should be melted and bubbly.
08 - Remove toothpicks carefully. Let chicken rest for 3–5 minutes before serving. Garnish with additional chopped parsley if desired. Serve hot.