· It will thicken as it reaches a boil Pour the potato mixture into a 6cup gratin dish, and pour the cream on top Place the dish on a baking sheet and bake for 1 hour, or until most of the liquid is absorbed and the potatoes are tender when pierced with a fork Let the potatoes rest for to 30 minutes before servingKabobs' Potato Au Gratin Dauphinoise provides a visually impressive and individually portioned, alternative to serving potatoes Consisting of rich cream, butter, hand sliced potatoes, and a decadent blend of Gruyere and cheddar cheese, the Potato Au Gratin Dauphinoise is slowly baked in an impressive cylindrical stacked shape12 · Potatoes au Gratin – neglect scalloped potatoes, THIS is the creme de la creme of all potato recipes!! Incredible Gratin Dauphinois Potato Bake Julie Blanner Dauphinoise potatoes vs potatoes au gratin