In a medium bowl, mix together the cream cheese, cheddar cheese, jalapeños, garlic powder, onion powder, smoked paprika, and black pepper until smooth.
Make a pocket in each chicken breast by slicing horizontally through the thickest part, leaving one side intact.
Season the exterior of each chicken breast with salt and pepper.
Fill each chicken pocket with the cheese mixture, being careful not to overfill.
If desired, sprinkle breadcrumbs over the stuffed chicken for a crunchy topping.
In an oven-safe skillet, heat the olive oil over medium-high heat and sear each stuffed chicken breast for 4–5 minutes on each side until golden brown.
Transfer the skillet to the preheated oven and bake for 20–25 minutes, or until the chicken is fully cooked and reaches an internal temperature of 165°F (74°C).
Allow the chicken to rest for 5 minutes before slicing for serving.
Notes
For an elegant presentation, slice the stuffed chicken breasts diagonally and drizzle with sriracha.