Provide clear step-by-step cooking instructions:

1. Preheat oven to 375°F (190°C).
2. Slice the chicken breasts horizontally to create pockets, being careful not to slice all the way through.
3. In a bowl, mix cream cheese, mozzarella, bacon, ranch seasoning, garlic powder, salt, and pepper.
4. Stuff each chicken breast with the cheese mixture and secure with toothpicks if needed.
5. Heat olive oil in a skillet over medium-high heat and sear chicken on both sides until golden brown.
6. Transfer chicken to a baking dish and bake for 15-20 minutes or until the internal temperature reaches 165°F (74°C).
7. Serve hot and enjoy!