Super Cheesy Potatoes

Directions

1. 1
   Place potato slices in a bowl of water while preparing remaining ingredients.
2. 2
   Preheat oven to 350 degrees F (175 degrees C). Spray a 9x13-inch baking dish with cooking spray.
3. 3
   Melt butter in a saucepan over medium heat; cook and stir flour in melted butter for 2 to 3 minutes. Stir in milk until thickened, 4 to 5 minutes more. Add American cheese, mixing until melted. Pour in jarred cheese sauce and cook and stir until smooth.
4. 4
   Spread about 1/2 cup sauce in the bottom of the prepared baking dish. Layer potatoes slices in baking dish, alternating with cheese sauce.
5. 5
   Bake in preheated oven until potatoes are tender, about 90 minutes.