Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. In large bowl, whisk together soup and sour cream. Stir in 1 1/2 cups of the cheese, potatoes and bacon until well mixed. Spoon into baking dish.
Bake 35 to 45 minutes or until hot in center and bubbly around edges, adding remaining cheese during last 5 minutes of baking. Sprinkle with additional bacon.