1. Preheat oven to 350 degrees.
2. Season potatoes to taste.
3. Spray a casserole dish with non-stick cooking spray.
4. In a bowl, combine milk, soup and sour cream.
5. Combine potatoes with milk and soup mixture. Add 1 cup cheddar cheese.
6. Spread evenly into casserole dish and push a tblsp of butter into the mixture at 4 different places. This will help to prevent sticking while the dish cooks. Top with remaining cheese.
7. Bake for about 30-45 minutes or until cheese starts to brown.