Au Gratin Potatoes are the ultimate comfort food, bringing together layers of tender potatoes and onions, all enveloped in a rich and creamy cheese sauce. What sets this dish apart is its gooey, bubbly texture that you just can’t resist. When you pull it from the oven, its golden, crispy top beckons, promising warm indulgence with each spoonful. This side dish practically steals the show at holiday gatherings, turning simple dinners into memorable feasts.
I first made Au Gratin Potatoes for a family Christmas celebration. The aroma of melted cheese and baked potatoes filled the kitchen, and as the guests dug in, I couldn’t help but feel a sense of pride. Each bite was a reminder of cozy gatherings spent with loved ones around the table, sharing laughter and stories. This recipe not only satisfies those winter cravings but also works beautifully for Thanksgiving, Easter, or any festive occasion. Ready to make your own? Let’s dive in!
Why You’ll Love This Recipe
- Simple & Quick: Prep time is just 20 minutes, and you’ll have a hearty side ready to impress.
- Irresistible Flavor: Creamy cheese blends perfectly with tender potatoes, creating a dish that’s both comforting and rich.
- Eye-Catching Appeal: The beautiful golden crust on top makes it a standout dish at any table.
- Flexible Serving: Perfect for holidays, dinners, or family gatherings — it pairs nicely with meats and salads alike.
- Diet-Friendly Options: Easy to adapt — try using dairy-free cheese for a suitable option.
Ingredients You’ll Need
- 3 pounds Yukon gold or red potatoes: These varieties hold their shape well and have a lovely creamy texture when baked. You can substitute with Russet potatoes if needed, but they may be starchier.
- 1 medium sweet or yellow onion: Adds a subtle sweetness and depth to the dish. Yellow onions are more traditional, but feel free to try a shallot for a gourmet twist.
- 3 tablespoons butter: Used for creating a luscious roux that makes your cheese sauce silky. Unsalted butter is recommended to control seasoning.
- 3 tablespoons flour: Essential for thickening your cheese sauce; all-purpose flour works best here.
- 2 cups whole milk: Provides creaminess to the sauce. You can use 2% milk if you prefer a lighter option, but avoid skim for the best flavor.
- 1 teaspoon ground dry mustard: A unique addition that enhances the cheese flavor. If you don’t have it, omit it — your dish will still be delicious.
- 1 cup sharp cheddar cheese, shredded: Delivers that quintessential cheesy taste. A blend of cheddar and Monterey Jack could also work well.
- ½ cup Gruyère or Swiss cheese, shredded: Offers a nuttiness that complements the cheddar. If you’re not a fan, mozzarella can be used, though the flavor will be milder.
- Salt and ground black pepper, to taste: Essential for enhancing all the flavors in your dish.
How to Make Au Gratin Potatoes
- Preheat the oven: Begin by preheating your oven to 400°F (200°C). This ensures a perfect bake and bubbly top.
- Prepare the casserole dish: Grease a 3-quart casserole dish with non-stick cooking spray and set it aside.
- Slice the potatoes: Scrub the 3 pounds of Yukon gold or red potatoes until clean, then pat them dry. Using a sharp knife or mandoline slicer, cut them into ¼-inch thick slices for even cooking.
- Slice the onion: Cut the onion in half, place the flat side down, and slice it as thin as possible. This allows the onion to mingle beautifully with the potatoes.
- Layer the vegetables: In the greased casserole dish, layer the sliced potatoes and onions, alternating as you go for maximum flavor integration.
- Make the cheese sauce: In a medium saucepan, melt 3 tablespoons of butter over medium heat. Whisk in 3 tablespoons of flour and cook for 1-2 minutes until lightly golden.
- Add liquids: Gradually whisk in 2 cups of whole milk and continue stirring. Add in 1 teaspoon of ground dry mustard, seasoning with salt and pepper to taste. Keep whisking until the mixture thickens and is bubbling.
- Incorporate the cheese: Remove the pan from heat and stir in 1 cup of shredded sharp cheddar cheese and ½ cup of Gruyère or Swiss cheese, mixing until melted and creamy.
- Combine and bake: Pour the cheese sauce evenly over the layered potatoes and onions. Cover with foil (sprayed with non-stick cooking spray) and bake for 60 minutes.
- Finish baking: After 60 minutes, remove the foil and bake for an additional 20-30 minutes, or until the sauce is bubbly around the edges and the top turns light golden brown.
- Let it rest: Once out of the oven, let it sit for 15 minutes before serving. This helps it set and makes serving easier.
Storing & Reheating
To store leftover Au Gratin Potatoes, let them cool to room temperature before placing them in an airtight container. They should be kept in the refrigerator for up to 3-5 days. For longer storage, you can freeze them for up to 3 months. Just make sure to wrap them tightly in plastic wrap or use a freezer-safe container. When you’re ready to enjoy them again, reheat in the oven at 350°F (175°C) until warmed through, about 20-25 minutes. Note that the texture may change slightly upon reheating, but a sprinkle of extra cheese can refresh its creamy goodness!
Chef’s Helpful Tips
- Avoid watery potatoes by making sure to slice them evenly — variations in thickness can lead to uneven cooking.
- For a touch of gourmet, consider adding minced garlic or herbs like thyme or rosemary to your cheese sauce.
- If you find the top browning too quickly, cover it loosely with foil to prevent burning while allowing the inside to cook.
- While the cheese sauce is important, don’t hesitate to experiment with different cheeses or combinations to suit your taste.
- Make the cheese sauce ahead of time and assemble the dish at least a few hours before baking to save time.
The rich, creamy layers of Au Gratin Potatoes are irresistible! With its cheesy goodness and tender bites, this recipe is sure to become a cherished family favorite. Don’t be afraid to experiment with flavors or tweak the recipe to make it your own. Whether it’s a casual weeknight or a festive occasion, these potatoes will impress, making every meal feel a little extra special.
Recipe FAQs
Can I use other types of cheese?
Absolutely! While sharp cheddar and Gruyère or Swiss offer fantastic flavor, you can mix it up with cheeses like mozzarella for stretching, or pecorino for a sharper bite. The key is to find a balance that you enjoy.
How do I prevent my potatoes from browning?
To keep your potatoes from browning before cooking, use them as soon as they are sliced. If you need to slice them in advance, place them in a bowl of cold water to prevent discoloration, draining them before layering in the casserole.
Can I prepare this dish in advance?
Yes, you can assemble the Au Gratin Potatoes a day ahead. Refrigerate before baking, and just extend the baking time by about 10-15 minutes, checking for doneness, as it will be colder when it goes into the oven.
What should I serve with Au Gratin Potatoes?
These cheesy potatoes pair wonderfully with roasted meats, salads, or even on their own as a comforting dish. They are particularly delightful alongside ham, chicken, or grilled vegetables!
Print
Au Gratin Potatoes
Experience the comforting taste of Au Gratin Potatoes. This dish features layers of tender potatoes, sweet onions, and a creamy, cheesy sauce. A simple yet flavorful recipe perfect for meals that warm the heart and satisfy the appetite.
- Total Time: 2 hours 15 minutes
- Yield: 10 servings 1x
Ingredients
- 3 pounds yukon gold or red potatoes
- 1 medium sweet or yellow onion
- 3 tablespoons butter
- 3 tablespoons flour
- 2 cups whole milk
- 1 teaspoon ground dry mustard
- 1 cup sharp cheddar cheese, shredded
- ½ cup gruyere or swiss cheese, shredded
- salt, to taste
- ground black pepper, to taste
Instructions
- Preheat oven to 400°F (200°C). Grease a 3 quart casserole dish with non-stick cooking spray and set aside.
- Scrub the potatoes and pat them dry with paper towels. Slice each potato into 1/8" thin slices using a sharp knife or mandoline slicer.
- Cut the onion in half, place the flat side down, and slice as thinly as possible.
- Layer the potato and onion slices in the prepared casserole dish.
- In a medium saucepan, melt the butter. Whisk in the flour and cook for 1-2 minutes.
- Slowly whisk in the milk and ground dry mustard. Season with salt and pepper. Continue whisking over medium heat until the mixture thickens and bubbles.
- Remove from heat and stir in the shredded cheeses until melted.
- Pour the cheese sauce over the layered potatoes and onions.
- Spray foil with non-stick cooking spray and cover the baking dish. Bake for 60 minutes.
- Remove the foil and bake for an additional 20-30 minutes until bubbly and golden brown on top.
- Let sit for 15 minutes before serving.
Last Step:
Please leave a rating and comment letting us know how you liked this recipe! This helps our business to thrive and continue providing free, high-quality recipes for you.Notes
For extra flavor, consider adding garlic or herbs to the cheese sauce.
Soaking the sliced potatoes in cold water for 30 minutes can help remove excess starch and keep them from browning.
Ensure the cheeses are at room temperature for easier melting.
- Prep Time: 20 minutes
- Cook Time: 115 minutes
- Category: Side Dish
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 serving
- Calories: 380
- Sugar: 2g
- Sodium: 500mg
- Fat: 22g
- Saturated Fat: 12g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 35g
- Fiber: 3g
- Protein: 11g
- Cholesterol: 50mg
