Anna Louise Dauphinoise potatoes are the most luxurious thing you can do with a potato. Wafer-thin slices layered in a dish, covered in cream infused with garlic and a little nutmeg, baked slowly until the cream has absorbed into the potato and reduced to a golden, slightly caramelised gratin on top.
It is one of those side dishes that steals the show — people talk about the dauphinoise more than whatever they were eating alongside it.
Mary Berry’s dauphinoise potatoes recipe is completely straightforward. The technique is simple — slice, layer, pour, bake — and the result is extraordinary. Rich, silky, deeply flavoured, with a beautiful golden top and tender, creamy potato all the way through.
This is the side dish I make when I want to impress without stress. Once it is in the oven, it needs nothing from you for an hour and a half.
What Makes Perfect Dauphinoise
Wafer-thin slices. The potato slices must be very thin — 2 to 3mm — so they cook through completely and absorb the cream evenly. A mandoline gives the most consistent result; a sharp knife and patience work equally well.
Infused cream. The cream is warmed with garlic, a bay leaf, and nutmeg before being poured over the potato — this infusion carries the flavour through every layer rather than just the surface.
Time. Dauphinoise potatoes cannot be rushed. A low, slow bake — 160°C for 1 hour 30 minutes — gives the cream time to reduce and the potato time to become completely tender. A higher, faster bake gives you cream that splits and potato that is cooked on the outside and raw in the middle.
Ingredients for Mary Berry Dauphinoise Potatoes
- 1.2kg waxy potatoes (Charlotte or Desiree — not floury Maris Piper)
- 2 garlic cloves, crushed
- 500ml double cream
- 200ml whole milk
- 1 bay leaf
- ½ tsp freshly grated nutmeg
- Salt and freshly ground white pepper
- 25g unsalted butter, for greasing
- 75g Gruyère cheese, grated (optional but wonderful)
How to Make Mary Berry Dauphinoise Potatoes — Step by Step
Step 1 — Preheat and Prepare
Preheat your oven to 160°C / 140°C fan / Gas 3. Rub a large, deep ovenproof dish generously with butter — approximately 28x20cm and at least 5cm deep.
Step 2 — Infuse the Cream
Place the double cream, whole milk, crushed garlic, bay leaf, nutmeg, salt, and white pepper in a saucepan over a medium heat. Bring to just below simmering — small bubbles around the edges. Remove from the heat and leave to infuse for 10 minutes. Remove the bay leaf.
Step 3 — Slice the Potatoes
Peel the potatoes and slice as thinly as possible — 2 to 3mm is the target. A mandoline on its thinnest setting gives the most consistent result. If slicing by hand, use the sharpest knife you have and work slowly and carefully.
Do not rinse the sliced potato — the starch on the surface helps the layers bind together and thickens the cream during cooking.
Step 4 — Layer
Arrange the potato slices in overlapping layers in the prepared dish. Season each layer lightly with salt and white pepper as you go — do not rely on the cream alone for seasoning.
Step 5 — Pour and Top
Pour the infused cream mixture evenly over the layered potato. Press the top layer of potato down gently into the cream — every slice should be submerged or at least wetted by the cream.
If using Gruyère, scatter it evenly over the top.
Step 6 — Bake
Cover the dish tightly with foil and bake for 1 hour. Remove the foil and bake for a further 25 to 30 minutes until the top is deep golden brown and a skewer or sharp knife inserted into the centre meets no resistance — the potato should be completely tender all the way through.
Step 7 — Rest and Serve
Leave to rest for 10 minutes before serving — this allows the cream to settle and makes serving significantly neater. Serve in generous spoonfuls alongside roast beef, roast lamb, or grilled fish.
My Top Tips For Mary Berry’s Dauphinoise Potatoes
Use waxy potatoes — not floury. Waxy potatoes (Charlotte, Desiree, Nadine) hold their shape during the long bake and give you distinct, silky layers. Floury potatoes (Maris Piper, King Edward) disintegrate into mush. Waxy only.
Do not rinse the sliced potato. The surface starch helps the layers bind together and thickens the cream during cooking. Rinsing removes it and gives you a thinner, less cohesive finished dish.
Season every layer. Do not rely on the cream alone to season the dish. Add a light seasoning of salt and white pepper between each layer of potato — it makes a significant difference to the depth of flavour throughout.
Use white pepper rather than black. White pepper gives a clean, subtle heat without visible black specks in the cream. The appearance of dauphinoise matters — it should be pale and pristine with a golden top.
Cover with foil for the first hour. This traps steam and ensures the potato cooks through gently before the top browns. Removing the foil for the final 25 to 30 minutes gives the beautiful golden gratin top.
Rest for 10 minutes before serving. The cream is very liquid when the dish comes out of the oven. Ten minutes of resting allows it to thicken and settle, making the dish significantly easier to serve neatly.
Serving Suggestions
Alongside roast beef — the richness of the cream and potato is the perfect complement to a well-seasoned roast. With roast lamb and green beans. With grilled salmon or sea bass for a more elegant, lighter combination. As a standalone supper with a simple green salad.
How to Store Mary Berry’s Dauphinoise Potatoes
In the fridge: Cover and store for up to 3 days. Reheat covered with foil in a 160°C oven for 20 to 25 minutes until piping hot throughout.
In the freezer: Dauphinoise freezes reasonably well for up to 2 months — the cream can separate slightly on defrosting but comes back together when reheated gently. Defrost overnight in the fridge and reheat as above.
Mary Berry Dauphinoise Potatoes Recipe
Ingredients
Method
- Preheat oven to 160°C / 140°C fan / Gas 3. Rub a deep 28x20cm dish generously with butter.
- Warm cream, milk, garlic, bay leaf, nutmeg, salt, and white pepper to just below simmering. Remove from heat. Infuse 10 minutes. Remove bay leaf.
- Slice potatoes 2–3mm thin. Do not rinse.
- Layer potato slices in the dish, seasoning lightly between each layer.
- Pour infused cream evenly over potato. Press top layer down gently. Scatter Gruyère on top if using.
- Cover tightly with foil. Bake 1 hour. Remove foil. Bake 25–30 minutes until deep golden and a skewer meets no resistance.
- Rest 10 minutes. Serve.
Notes
Frequently Asked Questions
Can I make dauphinoise potatoes ahead of time?
Yes — assemble completely, cover, and refrigerate for up to 24 hours before baking. Add 15 minutes to the covered baking time if cooking from cold.
Why did my cream curdle or split?
The oven temperature was too high, or the cream was brought to a rapid boil before being poured over the potatoes. Keep the oven at 160°C and make sure the cream is only warmed — not boiled — during infusing.
Can I use single cream instead of double?
You can but the result will be significantly less rich. Single cream is also more likely to split during the long bake. Double cream gives the best result — this is not a dish for compromise.
Can I add other ingredients?
Yes — thinly sliced leeks layered between the potato add a wonderful flavour. Smoked salmon layered through the potato is luxurious. Caramelised onions between the layers are deeply flavourful. All work well with the basic recipe.
Why are my potatoes still hard after the full cooking time?
Either the slices were too thick, the oven was too low, or the dish was not covered with foil for long enough. Potato slices must be 2 to 3mm — any thicker and they will not cook through in the given time.
Can I make individual dauphinoise portions?
Yes — use individual gratin dishes or large ramekins. Reduce the covered baking time to 40 to 45 minutes and the uncovered time to 15 to 20 minutes.
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