Step 1

Preheat oven to 400 degrees F. Coat an 8-inch square baking dish or a 2-quart casserole dish with cooking spray.

Step 2

Arrange one layer of potatoes in baking dish. Sprinkle with salt, pepper, 2 tablespoons flour, 2 tablespoons Parmesan cheese, and 1 tablespoon butter, cut into pieces and distributed evenly. Repeat layers 4 more times. Slowly pour half-and-half evenly over potatoes.

Step 3

Bake 50 to 55 minutes, or until potatoes are tender and top is golden brown. Serve immediately.