Duchess Potato Casserole
Why This Recipe Works
Pommes duchesse is a classic French preparation of piped individual mounds of egg-enriched mashed potatoes. They can be made in advance, they look festive, and they taste great with a variety of entrées; however, they are rather fussy to prepare. To make this dish easier to pull off, we skipped the piping and baked the mashed potatoes in a baking dish. Our mashed potatoes, made from buttery Yukon Golds, are enhanced with butter, egg yolks, half-and-half, and nutmeg. To give the casserole a crisp, golden brown, attractive finish, we coated the top with a mixture of butter and egg whites and then scored the surface with a paring knife before baking.