Foryoueats: Loaded Baked Potato Soup

4 slices bacon, diced

5 tablespoons unsalted butter

¼ cup all-purpose flour

3 ½ cups milk, or more, as needed

3 russet potatoes, peeled and cubed

2 green onions, thinly sliced

1 cup shredded cheddar cheese

½ cup sour cream

Kosher salt and freshly ground black pepper, to taste

Loaded Baked Potato Soup