Start by baking the potatoes. Let them cool in iced water, then drain. Peel the potatoes and cut them into cubes.
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Combine the potatoes with the butter, sour cream, milk, onion powder, garlic powder, salt, pepper, and some of the cheese, bacon, and scallions. Then, mash.
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Top with the remaining cheese, bacon, and green onions. Bake and serve.
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