There are some dishes you just never question. Potato gratin with turkey ham is one of them: an absolute, timeless classic that effortlessly wins everyone over at the table. No need to defend it — it speaks for itself.
Set it on the table and listen: the crust cracking slightly under the spoon, the spiral of steam escaping, the smell of melted cheese filling the room. Inside, the potatoes are so tender they yield almost without resistance, drowned in a creamy sauce subtly flavored by the turkey ham. The surface is golden like light caramel, almost amber in places around the edges. It’s the kind of dish where you end up scraping the bottom of the pan.
Why you’ll love this recipe
Ingredient Notes
Potatoes, turkey ham, Emmental, and homemade béchamel: simple ingredients for an impressive result.
- Potatoes : Choose a waxy variety — Charlotte, Nicola, or Amandine. They hold up during cooking without turning into mash between the layers. Avoid floury varieties like Bintje for this type of dish, as they break apart.
- Turkey ham : Plain or slightly smoked, according to your preference. Smoked ham adds a bit more character to the sauce. Cut it into thick strips rather than thin slices — this gives it some bite and keeps the layers distinct.
- Grated Emmental : Emmental remains the safe choice: it melts well, browns without excessive grease, and forms a beautiful crust. If you want more flavor, mix in some grated Comté. Avoid ready-made ‘pizza cheese’ blends — they melt poorly and make the dish rubbery.
- Butter, flour, milk : The base béchamel. 40g butter, 40g flour, 50cl whole milk. Whole milk matters — the sauce will be significantly rounder and creamier than with semi-skimmed.
- Nutmeg : A small pinch, no more. Freshly grated if you can — the difference from pre-ground powder is obvious in the aroma. It’s what turns a basic béchamel into something truly great.
Potatoes first
Peel and slice the potatoes into thin rounds — about 3 mm, no more. At this thickness, they cook evenly and absorb the sauce well without disintegrating. Rinse them in cold water until the water is clear: you’re removing surface starch, which prevents the layers from sticking together haphazardly. Then dry them with a clean towel. This step, which many skip, really changes the final texture — the difference is visible.
The béchamel, made simple
Melt the butter over medium heat in a saucepan. Add the flour at once and stir constantly for about 90 seconds — the roux should smell slightly nutty, a sign that the flour is cooked. Then gradually pour in the milk, still stirring, to avoid lumps. The sauce will first seem too liquid, then thicken significantly in a few minutes. Season with salt, pepper, and a pinch of freshly grated nutmeg. It should coat the back of the spoon without being as thick as glue.
Assembly, layer by layer
Preheat the oven to 180°C. In a lightly buttered gratin dish, start with a layer of potatoes, overlapping them slightly. On top, arrange the turkey ham strips, then pour a generous ladle of béchamel. Repeat the process two or three times depending on the height of your dish. The last layer should be béchamel — generously covered with grated Emmental. Press down slightly with your palm to pack everything together.
In the oven. And we wait.
Bake for 40 to 50 minutes. Around 35 minutes, the kitchen will start to smell like gratinating cheese — a warm, slightly caramelized scent. That’s a good sign. The surface should be golden like light caramel, with a few darker spots at the edges. If it browns too quickly, cover with aluminum foil and continue cooking. Check with the tip of a knife: if it slides in without resistance to the bottom, it’s ready. Let it rest for 5 minutes before serving — the sauce stabilizes and the portions cut clean.
Tips & Tricks
- Don’t skip the resting time after cooking. 5 minutes may seem anecdotal, but it’s what prevents the gratin from collapsing into a mess when you serve.
- Butter the bottom and sides of the dish well before assembling — this prevents the potatoes from sticking and makes serving much cleaner.
- If you’re preparing the gratin the day before, save the grated cheese for the moment it goes into the oven. Added too early, it dries out and hardens upon reheating instead of melting correctly.
Can I prepare the gratin in advance?
Yes, and it’s even recommended. Assemble the complete gratin the day before, cover it with plastic wrap, and keep it in the refrigerator without baking. Add the grated cheese at the last moment, just before cooking, to keep it from drying out.
How do I prevent the gratin from being too liquid?
Two common causes: potatoes not dried well after rinsing, or a béchamel that is too thin. Dry the slices thoroughly with a towel, and let the béchamel thicken until it clearly coats the spoon before assembling the dish.
Which potato variety should I choose?
Go for a waxy variety: Charlotte, Nicola, or Amandine. They hold their shape and absorb the sauce without falling apart. Floury varieties like Bintje are better for mash — they would yield a mushy result here.
Can I freeze this gratin?
Technically yes, but the texture of the potatoes changes after freezing — they become a bit grainy. It’s better to keep the gratin in the fridge for 2 to 3 days and reheat it in the oven rather than freezing it.
How do I reheat the gratin without losing the crispness?
Always in the oven, at 160°C, for 15 to 20 minutes depending on thickness. Avoid the microwave, which softens the crust and makes the sauce greasy. A splash of water or milk on top before baking prevents it from drying out.
Can I replace the béchamel with sour cream or heavy cream?
Yes, that’s a faster variation. Pour 30cl of thick crème fraîche or heavy cream directly between the layers. The result is richer and slightly less structured, but just as good. Season well as cream is more neutral than homemade béchamel.
Potato and Turkey Ham Gratin
French
Main Course
A generous family gratin with layers of tender potatoes, turkey ham, and a creamy béchamel topped with Emmental. Simple, comforting, and effective.
Ingredients
- 1 kg waxy potatoes (Charlotte, Nicola, or Amandine)
- 250 g plain or smoked turkey ham
- 40 g butter
- 40 g flour
- 500 ml whole milk
- 125 g grated Emmental
- 1 onion (optional)
- 1 clove garlic (optional)
- 1 pinch freshly grated nutmeg
- to taste salt and pepper
Instructions
- 1Preheat the oven to 180°C. Peel the potatoes and cut them into thin slices of about 3 mm.
- 2Rinse the slices in cold water until the water runs clear, then dry them thoroughly with a towel.
- 3Cut the turkey ham into strips. Finely slice the onion and mince the garlic if using.
- 4Melt the butter over medium heat in a saucepan. Add the flour and stir constantly for 1 to 2 minutes until a slight nutty smell develops.
- 5Gradually pour in the milk while stirring continuously. Let it thicken over low heat until the sauce coats the spoon. Season with salt, pepper, and nutmeg.
- 6Butter a gratin dish. Arrange a layer of potatoes, then a layer of turkey ham and onion. Pour a ladle of béchamel.
- 7Repeat the layers until all ingredients are used. Finish with a layer of béchamel and sprinkle generously with grated Emmental.
- 8Bake for 40 to 50 minutes. Cover with foil if the top browns too quickly. Check doneness with the tip of a knife.
- 9Let rest for 5 minutes outside the oven before serving.
Notes
• Storage: 2 to 3 days in the refrigerator. Reheat in the oven at 160°C for 15 to 20 minutes to maintain crispness. Avoid the microwave.
• Make ahead: assemble the gratin the day before without the cheese, wrap, and refrigerate. Add the Emmental just before baking.
• Express version: replace the béchamel with 30 cl of thick crème fraîche poured directly between the layers to save time.
Nutrition Facts (per serving, estimated)
| 560 kcalCalories | 29 gProtein | 55 gCarbs | 23 gFat |
