01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or foil.
02 - In a small bowl, mix together the cream cheese, cheddar, Monterey Jack, jalapeños, green onions, and garlic powder until well combined.
03 - Pat the chicken breasts dry and season both sides with salt and pepper.
04 - Using a sharp knife, cut a pocket horizontally into each chicken breast, being careful not to slice all the way through.
05 - Stuff each chicken breast with about 2 tablespoons of the jalapeño cheese mixture. Secure with toothpicks if needed.
06 - Wrap each stuffed chicken breast with 2 slices of bacon, tucking the ends under the chicken or securing with toothpicks.
07 - Place the chicken breasts seam-side down on the prepared baking sheet.
08 - Bake for 30–35 minutes, or until the chicken is cooked through (internal temperature 165°F) and the bacon is crispy. Broil for 2–3 minutes at the end if needed to crisp the bacon further.
09 - Remove toothpicks before serving.