- Prep
- 20 min
- Cook
- 60 min
- Total
- 80 min
- Serves
- 6
Ingredients
What you’ll need — tap to tick off as you go
- 1 ¼ kg
- 500 ml
- 2 cloves
- 1 pinch
- 1 tsp
- ½ tsp
- 20 g
Process
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Preheat the oven to 160°C. Grease a 2-liter baking dish with the butter.
In a large bowl, combine the heavy cream, minced garlic, nutmeg, salt, and black pepper. Mix well.
Add the sliced potatoes to the cream mixture and toss gently to coat every slice evenly.
Layer the potato slices in the prepared baking dish, overlapping them slightly. Pour any remaining cream mixture over the top.
Bake for 50–60 minutes, until the potatoes are tender when pierced with a knife and the top is golden brown. If the top browns too quickly, cover loosely with foil for the last 15 minutes.
Let rest for 10 minutes before serving.
Kitchen notes
Kitchen notes
- The most common mistake is using waxy potatoes; they stay firm and won't absorb the cream. Use starchy potatoes like Russet or Idaho for a tender, creamy result.
- To check doneness, insert a knife into the center; it should slide in with no resistance. If there's any resistance, bake 5-10 more minutes.
- For even cooking, slice potatoes uniformly, about 2-3 mm thick. A mandoline makes this quick and consistent.
- If the top browns too quickly, cover with foil for the last 15 minutes to prevent burning while the potatoes finish cooking.
Substitutions
- heavy cream→half-and-half mixed with 1 tablespoon of cornstarch for thickening
- butter→olive oil or a neutral oil for greasing the dish
- nutmeg→a pinch of ground cinnamon or omit entirely
Storage & reheating
Store leftovers in an airtight container in the refrigerator for up to 4 days. To freeze, wrap portions tightly in foil and freeze for up to 2 months; thaw overnight in the fridge before reheating. Reheat in a 180°C oven for 15-20 minutes, covered with foil, until heated through. For individual portions, microwave on high for 2-3 minutes, but the oven gives a better texture.
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FAQ
The questions we get asked most
Why did my gratin dauphinois turn out watery?
Watery gratin usually happens because the potatoes weren't drained well after slicing or the cream wasn't absorbed. After slicing, pat the potatoes dry with a clean towel. Also, don't skip the resting time; it allows the cream to thicken as it cools.
Can I use milk instead of heavy cream?
Yes, but the result will be less rich and may curdle. If using milk, add a tablespoon of flour or cornstarch to help thicken. For best results, stick with heavy cream or a mix of cream and whole milk.
How do I know when the potatoes are fully cooked?
Insert a knife into the center of the dish; it should slide in easily with no resistance. The top should be golden brown and the cream should be bubbling around the edges. If not, bake for another 5-10 minutes.
Can I make gratin dauphinois ahead of time?
Yes, you can assemble it up to 24 hours in advance and store it covered in the refrigerator. Bake it straight from the fridge, adding 10-15 minutes to the baking time. You can also bake it fully, cool, and reheat later.
Why did my potatoes turn out tough or undercooked?
Tough potatoes often result from slicing them too thick or using waxy potatoes. Slice them thinly and uniformly, and use starchy potatoes. Also, ensure the oven is at the correct temperature and bake until a knife pierces easily.
Can I use frozen potatoes for this recipe?
Frozen sliced potatoes can work in a pinch, but they release more water and may become mushy. If using them, thaw and drain well, then pat dry before mixing with the cream. Adjust baking time as they may cook faster.
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