BAKED Cheesy Potato Gratin
Creamy layers of potato and sharp cheddar baked until golden and bubbling
Why this recipe works
Potato gratin is the ultimate comfort side. Thin layers of potato baked in seasoned cream until they're tender and melting, topped with a golden, bubbling crust of cheddar. It's rich, cozy, and the kind of dish that makes any meal feel special.
The Fritaire bakes this beautifully. The circulating heat cooks the potatoes evenly all the way through while the covered baking phase lets them soften in the cream without drying out. Then uncovering at the end gives you that deeply golden, crispy cheese top that defines a great gratin.
The seasoning here does a lot of work. Thyme, paprika, garlic, and onion powder layer flavor into the cream so every bite is savory and aromatic. Russet potatoes are the right choice because their starch helps thicken the cream into a luscious, clingy sauce as it bakes.
Ingredients
- 3-4 medium russet potatoes, thinly sliced
- 1 cup heavy cream
- 1/2 cup whole milk
- 2 tbsp unsalted butter, melted
- 2 tsp thyme leaves
- 3/4 tsp paprika
- 1/4 tsp garlic powder
- 1/4 tsp onion powder
- 1/4 tsp black pepper
- 1/2 tsp fine sea salt
- 2 cups shredded cheddar cheese
Notes on ingredients
Slice the potatoes thinly and evenly, ideally with a mandoline, so they cook at the same rate and layer neatly. Russets are ideal because their high starch content thickens the cream as it bakes. Sharp cheddar gives the most flavor, but you can use a mix of cheeses. Grate your own cheese if possible, since pre-shredded contains anti-caking agents that affect how smoothly it melts.
Instructions
Preheat
Set the Fritaire to 350°F (176°C) and let it preheat while you prepare the gratin.
Butter the dish
Butter an 8-inch baking dish that fits in your Fritaire. This prevents sticking and adds a little richness to the edges.
Make the cream mixture
In a bowl, whisk together the heavy cream, whole milk, melted butter, thyme leaves, paprika, garlic powder, onion powder, black pepper, and sea salt until evenly combined.
Layer the potatoes
Arrange a layer of thinly sliced potatoes in the buttered dish, overlapping them slightly. Sprinkle with cheese as you go, using about 3/4 of the total cheddar across the layers. Reserve the rest for the top.
Add the cream and bake covered
Pour the cream mixture evenly over the layered potatoes, making sure it seeps down through the layers. Cover the dish with foil and bake for 1 hour.
Uncover and finish
Remove the foil, sprinkle the remaining cheese over the top, and bake for another 5 to 10 minutes, until the cheese is melted, golden, and bubbling.
Rest and serve
Let the gratin rest for a few minutes before slicing. This helps it set so the layers hold together when you serve. Slice and enjoy.
Pro tips
1. Slice the potatoes thinly and evenly
A mandoline is the easiest way to get uniform slices. Even thickness means the potatoes cook at the same rate and the gratin layers neatly.
2. Make sure the cream covers the potatoes
Pour the cream slowly so it seeps between the layers. Potatoes that stick out above the liquid will dry out instead of softening.
3. Don't skip the covered phase
Covering with foil traps steam so the potatoes cook through and soften. Uncovering too early dries them out before they're tender.
4. Let it rest before slicing
The gratin needs a few minutes to set after baking. Cutting into it immediately means the layers slide apart and the cream runs.
Variations
1. Mix the cheeses
Swap some of the cheddar for gruyere, parmesan, or fontina. Gruyere is the classic gratin cheese and adds a nutty depth.
2. Add garlic
Use fresh minced garlic instead of garlic powder, or rub the baking dish with a cut garlic clove before buttering it for a subtle flavor.
3. Add layers
Layer in thinly sliced onions, leeks, or even cooked bacon between the potatoes for extra flavor and texture.
4. Make it herby
Swap the thyme for rosemary or add fresh chopped chives on top after baking for a burst of freshness.
5. Try sweet potatoes
Substitute half the russets with sweet potatoes for a sweeter, more colorful gratin. Keep the slices thin and even.
Storage and reheating
Store leftover gratin covered in the fridge for up to 4 days. It reheats beautifully. Warm individual portions in the air fryer at 320°F (160°C) for 8 to 10 minutes until heated through and the top re-crisps, or reheat in the microwave for speed. The gratin can also be frozen for up to 2 months, though the texture of the cream may change slightly. Thaw in the fridge overnight before reheating.
What to serve with it
This rich side pairs well with simple proteins and fresh sides. Try it with:
- Roast chicken or turkey
- Grilled or pan-seared steak
- Baked salmon
- A crisp green salad to cut the richness
- Roasted or steamed greens
It's also a natural fit for holiday spreads and Sunday roasts.
FAQ
What potatoes are best for gratin?
Russet potatoes are ideal because their high starch content thickens the cream as it bakes. Yukon Golds also work and hold their shape a bit better, giving a slightly creamier result.
Why is my gratin watery?
Usually the potatoes weren't sliced thin enough, or the gratin didn't rest before slicing. Thin, even slices and a few minutes of resting time help the cream set into a proper sauce.
Can I prepare it ahead?
Yes. You can assemble the gratin, cover it, and refrigerate it for a few hours before baking. You may need to add a few extra minutes to the covered bake time since it'll be cold going in.
Can I use milk instead of cream?
You can, but the gratin will be less rich and may not thicken as much. The cream is what gives it that luscious, velvety texture. For a lighter version, use more milk and less cream, but expect a thinner sauce.
Do I have to cover it with foil?
Yes, for the first hour. The foil traps steam so the potatoes cook through and stay tender. Uncovering only at the end gives you the golden, crispy cheese top without drying out the layers underneath.
Why this recipe works in the Fritaire
The circulating heat cooks the potato layers evenly all the way through, and the glass bowl lets you watch the cheese top turn golden and bubbling so you know exactly when it's done. The covered and uncovered baking phases give you tender potatoes and a crispy crust in one dish. And because there's no coating breaking down at baking temps, you're not wondering what's leaching into your food during a long cook. Just potatoes, cream, cheese, and heat doing what they're supposed to.
Final take
Cheesy potato gratin is comfort food at its finest. Tender layers of potato soaked in seasoned cream, topped with a golden cheddar crust that crackles when you cut into it. It takes a little time, but most of it is hands-off baking, and the result is worth every minute.
This is the side dish that turns an ordinary dinner into something memorable. It's perfect for holidays, Sunday dinners, or any time you want to bring a little richness to the table.
Make it once and it'll earn a permanent spot in your rotation.
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