Preheat oven to 400 F. Using a sharp knife, cut approximately 1/8 inch slices along each potato, stopping about 1/4 inch from the bottom.

In a small bowl, mix melted butter with ranch seasoning mix. Drizzle mixture over potatoes between the slices. Season with salt and pepper.

Place potatoes on a baking sheet lined with aluminum foil and bake for 45 to 60 minutes, or until potatoes are tender.

Once potatoes are cool enough to handle, stuff cheese between slices and bake until melted, an additional 5 minutes.

Top with sour cream, bacon and chives. Serve immediately.