Preheat your oven to 400°F (200°C).
Scrub the potatoes clean and pierce them several times with a fork.
Place the potatoes directly on the oven rack and bake for 50-60 minutes, or until tender.
Remove from the oven and let cool slightly.
Cut the potatoes in half lengthwise and scoop out the flesh into a bowl, leaving a thin shell.
Mash the potato flesh with sour cream, butter, milk, 3/4 cup of shredded cheddar cheese, bacon, and green onions.
Season with salt and pepper to taste.
Spoon the mixture back into the potato shells and place them on a baking sheet.
Sprinkle the remaining cheese on top of the filled potatoes.
Return to the oven and bake for an additional 15-20 minutes, or until the cheese is melted and bubbly.