Scoop out the inside of the potatoes and set aside. Reserve the skins for another recipe or discard.
Stir the flour into the bacon grease to make a roux. Cook about 1 minute, stirring constantly. Gradually pour in the milk while stirring until all the milk has been added. Bring heat to medium and keep stirring until the soup mixture starts to get thick.
Add the potatoes, green onions, salt, ground black pepper, bacon, cheese, & sour cream.. Stir well . Serve immediately.