Never Fail Scalloped Potatoes

• medium raw potatoes, sliced↗5
• tablespoons butter↗6
• salt and pepper
• cups milk↗1 1⁄2
• tablespoons cornstarch↗2
• tablespoons diced onions2

Step-by-step instructions

1. 1

   Mix the sliced potatoes and onion and place in a greased casserole. Mix sauce in a sauce pan by combining milk, butter, cornstarch, salt and pepper. Cook until smooth. Pour over potatoes. Bake 90 minutes at 350 degrees, uncovered.