Easy Au Gratin Potatoes (Dauphinoise)

This Au Gratin Potatoes (Dauphinoise) dish is creamy, rich and cheesy. It's like the Cadillac of scalloped potatoes. A must-try make-ahead holiday "hit" dish!! If your guests like potatoes and cheese, they will love this dish! It has a fancy look, but is easy to make with a little TLC making your béchamel sauce and building the Au Gratin into 3 beautiful layers.