Preheat your oven to 375°F (190°C). Pour grease, or line it with parchment paper, for easy clean-up.
Butterfly The Chicken
Using a sharp knife, carefully cut a pocket into each chicken breast, being careful not to slice all the way through. This will be the cavity for the broccoli filling.
Season The Chicken
Rub the chicken breasts with olive oil, then season both sides generously with salt, pepper, onion powder, garlic powder, and paprika.
Make The Filling
In a bowl, mix the chopped broccoli, cheddar cheese, cream cheese, garlic, salt, and pepper until well combined.
Stuff The Chicken
Divide the filling evenly among the chicken breasts, using a spoon to gently press it into the pockets. Use toothpicks if required to secure the filling in place.
Bake To Perfection
Place the stuffed chicken breasts within the prepared baking dish. Bake for 25–30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the cheese is bubbly.
Serve And Enjoy
Let the chicken rest for 5 minutes before serving. Remove the toothpicks and get ready to dig in!