Preheat oven to 375°F (190°C).
Butterfly chicken breasts and season inside and outside with salt, pepper, and paprika.
Heat olive oil in a skillet and sauté mushrooms and garlic 4–5 minutes until soft.
Remove from heat and mix mushrooms with cream cheese, parmesan, parsley, and thyme.
Spoon mushroom mixture into each chicken breast pocket and secure with toothpicks if needed.
Sear stuffed chicken in a skillet 2–3 minutes per side until golden.
Transfer to oven and bake 18–22 minutes until chicken reaches 165°F (74°C).
Rest 5 minutes before slicing and serving.