Loaded Baked Potato Soup

Name: Loaded Baked Potato Soup
Prep time: 25 min
Cook time: 1 h 15 min
Total time: 1 h 40 min
Cuisine: American
Ingredients: 4 to 5 medium russet baking potatoes (see note); 4 tablespoons butter; 1/2 cup all-purpose flour, divided; 6 cups milk (I use 2%); 2 teaspoons salt (I use coarse, kosher salt); 1/4 teaspoon ground black pepper; 3/4 cup shredded sharp cheddar cheese; 3 to 4 green onions (finely chopped); 1/3 cup light sour cream; Sour cream; Shredded cheddar cheese; Chopped green onions; Cooked (crumbled bacon)