Step 1

Preheat oven to 375 degrees F. Coat an 8-inch square baking dish with cooking spray.

Step 2

In a medium bowl, combine 1 cup cheddar cheese, the flour, milk, Italian seasoning, onion powder, salt, and pepper.

Step 3

Arrange half the potato slices in the baking dish. Pour half the cheese mixture over potatoes. Arrange remaining potatoes in baking dish, and pour remaining cheese mixture over potatoes. Dot with butter.

Step 4

Cover and bake 45 minutes. Remove potatoes from oven, stir gently, cover, and return to oven 20 additional minutes. Uncover potatoes and sprinkle evenly with remaining 1/2 cup cheddar cheese and the Parmesan cheese. Return to oven to bake 5 to 8 additional minutes, or until cheese is melted. Serve immediately.