Preheat the oven to 350 degrees F (175 degrees C). Prick potatoes several times with a fork and place onto a baking sheet.
Bake in the preheated oven until potatoes are easily pierced with a fork, 1 to 1 1/2 hours. Remove from the oven. Turn on the broiler to the low setting.
When potatoes are cool enough to handle, cut them lengthwise and scoop out flesh to within 1/4 inch of skin. Reserve flesh for another use.
Brush inside of potato skins with butter. Add 2 tablespoons cheese to each one, sprinkle with seasoned salt, and top with bacon.
Return to the oven and broil until cheese is melted, 2 to 3 minutes. Serve with sour cream and scallions.