When the potatoes have cooled, cut each potato in half and, using a spoon or a melon baller, scoop the flesh out of the skins, leaving as little flesh as possible. Place the potato flesh in a large bowl and add 1 stick of the butter, the sour cream, heavy cream, salt, and pepper and mash until chunky-smooth. Add the bacon, cubed white Cheddar, half of the grated Cheddar, the green onions, and eggs and mix thoroughly.
|