Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper or a silicone mat.
Prepare a simple filling: in a small bowl, mix the softened cream cheese, shredded cheddar, and chopped jalapeños. If you like, add a pinch of salt and pepper to taste.
Carefully cut a pocket into each chicken breast. You want a generous opening without through-cutting all the way through.
Stuff each pocket with a dollop of the cheese mixture. Press gently to seal and shape the breast back to a smooth surface.
If using bacon, wrap each stuffed breast with a strip of bacon or lay the bacon on top, then secure with a toothpick. This helps keep the filling inside and adds a smoky flavor.
Brush the outside with olive oil. Sprinkle garlic powder, smoked paprika, and a pinch of salt and pepper for color and depth.
Optional: for extra crunch, sprinkle panko breadcrumbs over the tops.
Place the chicken on the prepared sheet. Bake for 25–30 minutes, until the chicken reaches an internal temperature of 165°F (74°C) and the bacon (if used) is crispy.
If you want a quicker finish, you can sear the stuffed breasts in a hot oven-safe skillet for 2–3 minutes per side, then finish in the oven to 165°F.
Let rest for 5 minutes before serving. Slice with care to reveal the creamy filling inside.