Question: what is the difference between potato dauphinoise?
Answer: The Delicious Difference Between Potatoes Au Gratin and Dauphinoise. ... Potatoes au gratin are slices of pre-cooked (usually boiled) potato cooked in cream and topped with cheese which makes the gratin. Gratin Dauphinoise, on the other hand, is a dish made of thinly-sliced (not pre-cooked) potatoes that cook in cream.