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Easy Homemade Au Gratin Potatoes Recipe

Homemade Au Gratin Potatoes Recipe

Let me tell you about one of my favorite comfort foods: homemade au gratin potatoes. These layered, creamy potato wonders with a crunchy cheese topping have captured my heart.
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Prep Time: 30 minutes
Cook Time: 1 hour 30 minutes
Total Time: 2 hours
Course: Side Dish
Cuisine: French
Keyword: Homemade Au Gratin Potatoes Recipe
Servings: 4 Servings
Calories: 300kcal
Author: Rebecca Novak

Equipment

  • Oven

Ingredients

  • 3 tablespoons unsalted butter
  • 3 tablespoons all-purpose flour
  • ½ teaspoon sea salt
  • Salt and freshly ground black pepper to taste
  • 2 cups whole milk
  • 1½ cups shredded sharp Cheddar cheese
  • 4 medium russet potatoes thinly sliced
  • 1 medium onion sliced into rings
  • ½ teaspoon garlic powder optional, for extra savory depth
  • ¼ teaspoon smoked paprika optional, for a subtle smokey hint

Instructions

Step 1: Preheat Your Oven

  • Start by preheating your oven to 350°F (175°C). This will ensure that it’s hot and ready when it’s time to bake your masterpiece.

Step 2: Prepare the Sauce

  • In a medium saucepan over medium heat, melt the butter. Once melted, add the flour and stir continuously to form a roux. Cook it for about a minute, allowing it to bubble but not brown. Gradually whisk in the milk, ensuring no lumps form.
  • Cook until the mixture thickens—this should take about 5-7 minutes. Stir in salt, pepper, garlic powder, and smoked paprika, if using. Mix in 1 cup of cheese until melted and smooth.

Step 3: Layer the Potatoes and Onion

  • In a greased baking dish, arrange half of the sliced potatoes, creating an even layer. Add half of the sliced onion on top. Pour half of the cheese sauce over the potatoes and onions. Repeat with the remaining potatoes, onions, and sauce.

Step 4: Add the Topping

  • Sprinkle the remaining cheese over the final layer. For added texture, some breadcrumbs on the top can create a delightful crunch. However, this step is optional.

Step 5: Bake

  • Cover the dish with aluminum foil and bake for 45 minutes. After this time, remove the foil and continue baking for another 15-20 minutes. The top should be golden brown and bubbling deliciously.

Step 6: Let It Set

  • Once out of the oven, let your au gratin potatoes rest for about 10 minutes. This resting time allows the dish to set, making it easier to serve.

Notes

  • Choose the Right Potatoes – Russet potatoes are starchy and create the perfect texture in this recipe. Avoid waxy potatoes, as they won’t provide the desired creaminess.
  • Slice Evenly – Use a mandoline for uniformly thin slices. This ensures even cooking and consistent texture.
  • Experiment with Cheese – While sharp Cheddar is classic, consider adding Gruyère, Gouda, or even a bit of Parmesan for extra flavor.
  • Add Fresh Herbs – Sprinkling fresh thyme or chives in the layers can enhance the flavor profile.
  • Save Some Cheese for the Top – This way, you’ll achieve a beautifully old-fashioned cheesy crust.

Nutrition

Calories: 300kcal | Carbohydrates: 35g | Protein: 12g | Fat: 15g | Fiber: 2g
Tried this recipe?Let us know how it was!