Potatoes Au Gratin arranges thin russet slices upright in garlic and cheese cream. A covered bake makes them tender; an uncovered finish and broil create a crisp top. It serves eight.
Potatoes Au Gratin Ingredients
Main Ingredients: 4 tablespoons unsalted butter, softened and divided (2 tbsp for greasing, 2 tbsp for topping); 3 pounds russet potatoes (about 4-5 medium ones), peeled; 1 cup heavy cream; 1/2 cup white cheddar cheese, freshly shredded; 6 tablespoons Parmesan cheese, grated and divided (4 tbsp for mixture, 2 tbsp for topping); 3 garlic cloves, minced; Salt and freshly ground black pepper, to taste.
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How to Make Potatoes Au Gratin
- Get your oven ready: Preheat your oven to 375°F. Take about 2 tablespoons of the softened butter and grease your baking dish, making sure to cover the bottom and sides well.
- Prep those potatoes: Peel the russet potatoes and slice them super thin - we're talking about 1/8 inch slices if possible. A mandolin makes this job so much easier and gives you those perfect, uniform slices, but a sharp knife works too if you've got decent knife skills!
- Mix up the creamy goodness: In a large bowl, pour in the heavy cream and add the shredded white cheddar, 4 tablespoons of the Parmesan, and the minced garlic. Give it a good stir to blend everything together.
- Coat the potato slices: Toss your sliced potatoes into the cream mixture and gently mix until every slice is coated in that cheesy cream. Season generously with salt and black pepper - potatoes need a good amount of salt to really shine.
- Arrange in the baking dish: This is the fun part! Take stacks of potato slices and arrange them standing upright (not flat) in your buttered dish. Keep adding rows until you've used all your potatoes. It'll look fancy, I promise! Then pour any remaining cream mixture over the top of the arranged potatoes, and add another little sprinkle of salt and pepper.
- Add the finishing touches: Take the remaining 2 tablespoons of butter and dot small pieces all over the top of your arranged potatoes. This will melt down and create an amazing crust.
- First bake (covered): Cover the dish tightly with aluminum foil (this helps the potatoes steam and cook through). Pop it in your preheated oven and bake for about 35-40 minutes.
- Second bake (uncovered): After the initial baking time, take the dish out and remove the foil. Sprinkle the remaining 2 tablespoons of Parmesan cheese evenly over the top. Put it back in the oven, uncovered this time, and bake for another 25-30 minutes until the potatoes are completely tender when pierced with a fork.
- Get that golden-brown top: For that irresistible crispy, golden crust, switch your oven to broil on high. Place the dish under the broiler for just about 1 minute - watch it carefully so it doesn't burn! You want a beautiful golden-brown top with some crispy edges.
- Let it rest, then enjoy: Take your masterpiece out of the oven and let it rest for about 10 minutes. This helps the creamy sauce set up a bit, making it easier to serve and even more delicious. Then dig in and prepare for compliments!
For storage details after serving, the USDA leftovers and food safety guidance.
Why the Order Matters
Heat the oven to 375°F and use two tablespoons softened butter to coat the bottom and sides of a two-quart baking dish. Peel three pounds russet potatoes and cut uniform 1/8-inch slices. Stir one cup heavy cream with 1/2 cup freshly shredded white cheddar, four tablespoons of the six tablespoons Parmesan, and three minced garlic cloves. Coat every potato slice in that mixture and season generously with salt and pepper. Stand stacks of slices upright in tight rows, pour over remaining cream, season again, and dot with the remaining two tablespoons butter. Cover tightly with foil for 35–40 minutes. Uncover, add the reserved two tablespoons Parmesan, and bake another 25–30 minutes. Broil on high for about one watched minute, then rest ten minutes.
If you enjoy this recipe, you may also like Cheesy Garlic Butter Corn on the Cob.
Critical Visual and Timing Cues
Uniform 1/8-inch slices matter because thick and thin pieces do not become tender together. A mandolin is the most consistent option, although a sharp knife works when each cut is deliberate. Keep the slices upright rather than laying them flat; the exposed ridges are what brown during the uncovered stage. After 35–40 covered minutes, steam should have started softening the centers but the dish is not finished. During the following 25–30 minutes, test a central slice with a fork: it must be completely tender before broiling. The high broiler is only a color step, not extra cooking time. Watch continuously and stop at a golden, crisp-edged surface. The ten-minute rest lets the bubbling cream settle and cling instead of running across the plate.
Serving and Storage
Rest the gratin for the full ten minutes before cutting between the upright rows and lifting portions with a broad spoon. It serves eight and records 334 calories, 28 grams carbohydrate, 22 grams fat, and eight grams protein per serving. The dish is vegetarian and gluten-free, but butter, heavy cream, cheddar, and Parmesan mean it contains dairy and is not vegan, dairy-free, low-carb, or suitable for a dairy allergy. Refrigerate leftovers promptly. The recorded reheating method is to cover them with foil and warm at 350°F until heated through; foil protects the cream and keeps the exposed potato edges from becoming too dark. For a make-ahead dish, assemble and refrigerate one day, then allow an additional 10–15 minutes when baking from cold.
Practical Kitchen Notes
Keep divided ingredients explicit. Two tablespoons butter grease the dish and two are dotted over the potatoes. Four tablespoons Parmesan enter the cream mixture; two stay out until the foil is removed. Freshly shred the white cheddar so it melts smoothly. After peeling, coat the russets promptly so they do not discolor. Use a large bowl to cover slices without breaking them. Pack upright rows closely enough to support one another without crushing them. Pour remaining cream into the gaps. Although salt and pepper are to taste, season through the layers rather than only across the top.
Details Worth Preserving
Tight foil traps moisture so three pounds of potatoes cook through without their upper edges drying. Removing it releases steam, concentrates the sauce, and exposes the reserved Parmesan to direct heat. Do not move that final cheese into the initial mixture or omit the covered stage. Gruyère is an optional experiment, but white cheddar and Parmesan are the verified combination. The result should be creamy beneath and crisp on top, not soupy or dry. Use a two-quart dish deep enough for upright slices. If a central slice still resists a fork after the uncovered interval, continue ordinary baking briefly before broiling; surface color cannot compensate for undercooked potato.
Recorded Recipe Tips
- The perfect potatoes au gratin should be both creamy inside and crispy on top - the contrast is what makes this dish special.
- Feel free to experiment with different cheeses. Gruyère is traditional and amazing if you have it, but white cheddar and Parmesan work beautifully too.
- Leftovers reheat surprisingly well! Just cover with foil and warm in a 350°F oven until heated through.
- For a make-ahead option, you can assemble everything the day before, cover and refrigerate, then bake when needed (you might need to add 10-15 minutes to the baking time if starting cold).
Conclusion
Potatoes Au Gratin makes 8 servings in 90 recorded minutes. Preserve every listed quantity, temperature, timing cue, and ordered instruction for the intended result.
Frequently Asked Questions
- → How many servings does Potatoes Au Gratin make?
It makes 8 servings and serves 8.
- → How long does Potatoes Au Gratin take?
The recipe records 20 minutes of preparation, 70 minutes of cooking, and 90 minutes total.
- → Why are the potato slices arranged upright?
The upright rows expose their ridges to the uncovered heat, producing crisp golden edges while the lower portions stay in the garlic-cheese cream.
- → How do I know the gratin is ready to broil?
After the covered and uncovered bakes, a fork should pass easily through a central potato slice. Broil only then, for about one watched minute, to color the top.