Potatoes

How to make Potato Dauphinoise

Thin potato slices baked slowly in cream, garlic and cheese until tender.

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What it is

Potato Dauphinoise in the kitchen

Potato Dauphinoise is a French-style potato bake made with very thin potato slices cooked slowly in garlic-infused cream until the layers are soft, rich and lightly golden on top.

Why make it

Make potato dauphinoise when you want a luxurious potato side that turns roast lamb, steak, ham or simple green vegetables into a proper occasion: creamy layers, gentle garlic and a soft sliceable texture.

Best with

roast lamb, steak, ham, green vegetables and French-inspired menus

Method

Step-by-step

  1. Step 1

    Heat oven to 170°C fan / 190°C conventional. Butter a 24 x 18 cm gratin dish. Warm cream, milk, garlic, salt, pepper and nutmeg until steaming, then take off the heat.

    Look for: The dairy steams around the edge but does not boil hard. Tip: Warming the dairy helps the potatoes start cooking evenly. Avoid: Boiling cream hard can split it before baking.

  2. Step 2

    Slice potatoes 2–3 mm thick with a mandoline or sharp knife. Keep the slices together and do not rinse; the surface starch helps thicken the cream.

    Look for: Slices are flexible, almost translucent at the edges and evenly thin. Tip: Slice straight into a bowl only when ready to layer so they do not oxidise. Avoid: Thick 5 mm slices stay firm while the top over-browns.

  3. Step 3

    Layer the slices in overlapping rows, seasoning any very thick areas lightly, then pour over the warm garlic dairy until it sits just below the top layer.

    Look for: Cream is visible between slices but the top is not swimming. Tip: Press the layers down gently with clean hands. Avoid: Too much liquid makes a loose bake that will not slice.

  4. Step 4

    Cover loosely with foil and bake for 45 minutes so the potatoes soften before the top browns.

    Look for: A knife meets only slight resistance in the centre. Tip: Put the dish on a tray in case cream bubbles over. Avoid: Starting uncovered can brown the top while the middle is still raw.

  5. Step 5

    Remove foil, scatter cheese if using and bake another 25–35 minutes until the top is golden and the cream bubbles lazily at the edges.

    Look for: Top is burnished gold; bubbles are thick, not watery. Tip: Lower the oven slightly if browning too fast. Avoid: If the dairy boils violently, the bake may split.

  6. Step 6

    Rest for 10–15 minutes before serving so the cream settles and the layers slice cleanly.

    Look for: A spoonful holds soft layers rather than flooding the plate. Tip: Resting is part of the cooking time. Avoid: Serving straight from the oven makes the sauce run.
Storage

Make ahead and storage

Storage

Cool leftovers quickly, store covered in the fridge for up to 3 days, and reheat until piping hot. Crisp potato dishes are best refreshed in an oven or air fryer rather than a microwave.

Make ahead

Prepare the potato cuts, sauce or first cook stage ahead where possible, then finish close to serving so the texture stays at its best.

Freezing

Most potato dishes freeze acceptably but crisp or creamy textures are best fresh. Freeze only fully cooled portions and reheat from chilled or thawed until hot throughout.

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