Bake the potatoes at 400°F for one hour or until they're tender. Let the potatoes cool slightly. Reduce the oven's heat to 350°.
Cut each potato in half lengthwise. Scoop out the pulp, leaving a thin shell. In a large bowl, mash the pulp with butter. Stir in the sour cream, cheese, bacon and green onions. Spoon or pipe this mixture back into the potato shells.
Place the potatoes on a baking sheet. Bake for 30 to 35 minutes or until heated through.
