Preheat oven to 375°.
Wash and dry potatoes, then pierce each potato with a fork or knife on all sides.
Wrap each potato in foil and place on a baking sheet.
Place in oven and bake for 1 ½ hours or until they are cooked thoroughly.
Remove from oven and remove foil carefully when cool enough to handle.
Carefully slice potatoes lengthwise, removing a "v" section from the top, when potatoes are cool enough to handle.
Remove the insides of each potato making sure to leave some potato around the edges and place into a large mixing bowl.
Add butter, bacon, sour cream, cheddar cheese to mixing bowl and mix well.
Next add milk, garlic salt, green onions and salt and pepper to taste. Mix well.
Spoon potato filling into each potato shell and place back on the baking sheet.
Top with additional cheese, place back in the oven and bake until cheese has melted and potato filling is hot.
Remove from oven and enjoy!