Welcome to the ultimate guide for making Potatoes Au Gratin, a classic dish that combines tender potato slices with a rich, creamy cheese sauce. This decadent side dish is perfect for holidays, special occasions, or whenever you want to indulge in something truly comforting. Read on for a detailed recipe, cooking tips, and serving suggestions to create a flawless Potatoes Au Gratin that will wow your guests. Let’s dive into this creamy, cheesy delight!

What are Potatoes Au Gratin?
Potatoes Au Gratin is a traditional French dish made of thinly sliced potatoes baked in a creamy sauce, typically featuring cheese. The dish is known for its rich, savory flavor and melt-in-your-mouth texture. The top is usually baked to a golden brown, forming a deliciously crispy crust. This versatile dish can be served as a side for various main courses, from roasted meats to vegetarian entrees.
Ingredients List for Potatoes Au Gratin
- 6 large russet potatoes, peeled and thinly sliced
- 2 cups heavy cream
- 1 cup whole milk
- 3 cups shredded Gruyère cheese
- 1 cup shredded Parmesan cheese
- 4 cloves garlic, minced
- 1 medium onion, finely chopped
- ¼ cup unsalted butter
- 2 tablespoon all-purpose flour
- Salt and pepper to taste
- ¼ teaspoon nutmeg (optional)
- ¼ cup fresh parsley, chopped (for garnish)
Substitutions and Variations
- Potatoes: Use Yukon Gold potatoes for a creamier texture.
- Cheese: Substitute Gruyère with Swiss or Cheddar cheese for a different flavor profile.
- Milk: Use half-and-half instead of heavy cream and whole milk for a lighter version.
- Herbs: Add fresh thyme or rosemary for additional flavor.
- Garlic: Use roasted garlic for a milder, sweeter taste.
Step-by-Step Cooking Instructions

Preparing the Potatoes
- Preheat Oven: Preheat your oven to 375°F (190°C).
- Slice Potatoes: Peel and thinly slice the potatoes using a mandoline or sharp knife to ensure even slices.
Making the Cheese Sauce
- Sauté Onion and Garlic: In a large saucepan, melt the butter over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes. Add the minced garlic and cook for another 1-2 minutes.
- Make a Roux: Sprinkle the flour over the onion and garlic mixture, stirring constantly for about 2 minutes until the flour is lightly browned.
- Add Cream and Milk: Gradually whisk in the heavy cream and milk, ensuring there are no lumps. Bring to a simmer and cook until the sauce thickens, about 5 minutes.
- Add Cheese and Seasoning: Remove the saucepan from heat. Stir in 2 cups of Gruyère cheese and ½ cup of Parmesan cheese until melted and smooth. Season with salt, pepper, and nutmeg if using.
Assembling and Baking the Dish
- Layer Potatoes and Sauce: In a greased 9x13-inch baking dish, arrange a layer of potato slices. Pour a portion of the cheese sauce over the potatoes, spreading it evenly. Repeat the layering process until all the potatoes and sauce are used, finishing with a layer of sauce.
- Add Cheese Topping: Sprinkle the remaining 1 cup of Gruyère cheese and ½ cup of Parmesan cheese on top.
- Bake: Cover the dish with aluminum foil and bake in the preheated oven for 45 minutes. Remove the foil and bake for an additional 30 minutes, or until the top is golden brown and the potatoes are tender.
- Garnish: Allow the dish to cool for a few minutes before garnishing with chopped fresh parsley.
Common Mistakes to Avoid
- Thin Sauce: Ensure your sauce thickens properly by cooking it long enough after adding the flour.
- Overlapping Potatoes: Lay the potato slices evenly without overlapping too much to ensure even cooking.
- Underseasoning: Taste the sauce before assembling the dish to ensure it is well-seasoned.
- Uneven Baking: Rotate the dish halfway through baking for even browning.
Serving and Presentation Tips
- Family Style: Serve directly from the baking dish for a rustic, homey presentation.
- Individual Portions: Spoon servings onto plates and garnish with additional parsley for a touch of color.
- Accompaniments: Pair with roasted meats, a fresh green salad, or steamed vegetables.
How to Serve Potatoes Au Gratin
Serve Potatoes Au Gratin hot, straight from the oven. This dish pairs well with roasted chicken, beef tenderloin, or a holiday ham. The creamy, cheesy potatoes also complement vegetarian dishes like grilled portobello mushrooms or a hearty vegetable casserole.
Presentation Ideas for Potatoes Au Gratin
- Rustic Style: Serve in the baking dish with a garnish of fresh herbs for a homestyle feel.
- Elegant Touch: Use a decorative baking dish and garnish with finely chopped chives or thyme.
- Garnish: Add a sprinkle of paprika or a few twists of freshly ground black pepper for added color and flavor.
Potatoes Au Gratin Recipe Tips
- Prep Ahead: Assemble the dish a few hours ahead and refrigerate. Bring to room temperature before baking.
- Storage: Store leftovers in an airtight container in the refrigerator for up to 3 days.
- Reheating: Reheat in the oven at 350°F (175°C) until warmed through to maintain the crispy top.
Frequently Asked Questions (FAQs)
Q: Can I use a different type of potato?
A: Yes, Yukon Gold or even red potatoes can be used, though russet potatoes are traditional for their starchy texture.
Q: Can I make this dish ahead of time?
A: Absolutely! You can assemble the dish and refrigerate it for up to a day before baking. Just bring it to room temperature before baking.
Q: Can I freeze Potatoes Au Gratin?
A: It’s best to freeze after baking. Let it cool completely, then cover tightly and freeze. Reheat in the oven at 350°F (175°C) until warmed through.
Q: How can I make this dish healthier?
A: Use lower-fat milk and cheese options, and substitute some of the cream with chicken or vegetable broth.
Q: What can I use if I don’t have a mandoline?
A: A sharp knife works well, but make sure to slice the potatoes as thinly and evenly as possible.
Conclusion
Potatoes Au Gratin is the ultimate comfort food, with its creamy, cheesy layers of tender potatoes. Whether you’re serving it for a special occasion or as a luxurious side dish for a weeknight meal, this recipe is sure to impress. Follow the steps, tips, and variations provided to create the perfect Potatoes Au Gratin every time. Enjoy this timeless classic with your loved ones!
PrintPotatoes Au Gratin Recipe
This Potatoes Au Gratin recipe features thinly sliced russet potatoes layered with a rich, creamy sauce made from heavy cream, whole milk, Gruyère, and Parmesan cheese. Enhanced with garlic, onion, and a hint of nutmeg, and garnished with fresh parsley, this dish is a decadent and delicious addition to any meal.
- Prep Time: 20 minutes
- Cook Time: 1 hour
- Total Time: 1 hour 20 minutes
- Yield: 8 servings 1x
- Category: Side Dish
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Ingredients
- 6 large russet potatoes, peeled and thinly sliced
- 2 cups heavy cream
- 1 cup whole milk
- 3 cups shredded Gruyère cheese
- 1 cup shredded Parmesan cheese
- 4 cloves garlic, minced
- 1 medium onion, finely chopped
- ¼ cup unsalted butter
- 2 tbsp all-purpose flour
- Salt and pepper to taste
- ¼ tsp nutmeg (optional)
- ¼ cup fresh parsley, chopped (for garnish)
Instructions
- Preheat the oven to 375°F (190°C).
- In a large saucepan, melt the butter over medium heat. Add the minced garlic and finely chopped onion; sauté until softened.
- Stir in the flour and cook for 1-2 minutes to form a roux.
- Gradually whisk in the heavy cream and whole milk, cooking until the mixture thickens.
- Add the shredded Gruyère and Parmesan cheeses, stirring until melted and smooth.
- Season with salt, pepper, and nutmeg (if using).
- Layer half of the sliced potatoes in a greased baking dish. Pour half of the cheese sauce over the potatoes. Repeat layers.
- Cover with foil and bake for 45 minutes. Remove foil and bake for an additional 15-20 minutes until the top is golden and bubbly.
- Garnish with fresh parsley before serving.
Notes
- For extra flavor, add a pinch of nutmeg to the cheese sauce.
- Ensure the potatoes are evenly sliced for consistent cooking.
- Try substituting Gruyère with a blend of your favorite cheeses for a unique twist.
Nutrition
- Serving Size: 1 serving
- Calories: 450
- Sugar: 3g
- Sodium: 600mg
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