Indulge in the creamy, cheesy goodness of au gratin potatoes, a classic comfort food that pairs perfectly with any main course. This dish features layers of thinly sliced potatoes smothered in a rich, velvety sauce and topped with melted cheddar cheese, creating a golden, crispy finish.
Most of the ingredients for this recipe are common pantry staples, but you may need to ensure you have cheddar cheese and all-purpose flour on hand. These items are typically available in the dairy and baking sections of your local supermarket.
Ingredients for Au Gratin Potatoes Recipe
Potatoes: Thinly sliced to ensure even cooking and a tender texture.
Cheddar cheese: Grated to melt smoothly over the potatoes, adding a rich, cheesy flavor.
Milk: Used to create the creamy sauce that binds the dish together.
Butter: Melted to form the base of the sauce, adding richness and depth.
All-purpose flour: Combined with butter to thicken the sauce, ensuring a smooth consistency.
Salt: Enhances the overall flavor of the dish.
Black pepper: Adds a hint of spice and balances the richness of the sauce.
Technique Tip for This Recipe
When making au gratin potatoes, ensure your potatoes are sliced uniformly thin. This helps them cook evenly and absorb the sauce better. Use a mandoline slicer for precision.
Suggested Side Dishes
Alternative Ingredients
thinly sliced potatoes - Substitute with sweet potatoes: Sweet potatoes add a unique sweetness and a slightly different texture, making the dish more interesting.
grated cheddar cheese - Substitute with gruyere cheese: Gruyere melts well and has a rich, nutty flavor that complements the dish beautifully.
milk - Substitute with heavy cream: Heavy cream provides a richer and creamier texture, enhancing the overall flavor of the dish.
butter - Substitute with olive oil: Olive oil is a healthier fat option and adds a subtle, pleasant flavor to the dish.
all-purpose flour - Substitute with cornstarch: Cornstarch is a gluten-free alternative that thickens the sauce just as effectively.
salt - Substitute with sea salt: Sea salt has a more complex flavor and can enhance the overall taste of the dish.
black pepper - Substitute with white pepper: White pepper has a milder flavor and a slightly different heat profile, offering a subtle change in taste.
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How to Store or Freeze This Dish
Allow the au gratin potatoes to cool completely at room temperature before storing. This prevents condensation from forming inside the storage container, which can make the potatoes soggy.
Transfer the cooled potatoes to an airtight container. If you don't have an airtight container, you can use a baking dish covered tightly with aluminum foil or plastic wrap.
Store the container in the refrigerator. The au gratin potatoes will stay fresh for up to 3-4 days.
For longer storage, consider freezing. To freeze, first, ensure the potatoes are completely cooled. Then, transfer them to a freezer-safe container or heavy-duty freezer bags. Label the container with the date to keep track of freshness.
When ready to reheat, if frozen, thaw the potatoes in the refrigerator overnight. This slow thawing process helps maintain the texture and flavor.
Reheat the au gratin potatoes in the oven at 350°F (175°C) until heated through, approximately 20-30 minutes. If the top starts to brown too quickly, cover it with aluminum foil to prevent burning.
For a quicker reheating option, you can use the microwave. Place a portion of the potatoes in a microwave-safe dish, cover with a microwave-safe lid or plastic wrap, and heat on medium power in 1-2 minute intervals until hot. Stir occasionally to ensure even heating.
If you notice any separation of the sauce or a change in texture after freezing and reheating, a quick stir can help reincorporate the ingredients and restore the creamy consistency.
How to Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Place the leftover au gratin potatoes in an oven-safe dish.
- Cover the dish with aluminum foil to prevent the top from burning.
- Heat for about 20-25 minutes, or until the potatoes are heated through.
- For a crispy top, remove the foil during the last 5 minutes of reheating.
Microwave Method:
- Transfer a portion of the au gratin potatoes to a microwave-safe dish.
- Cover the dish with a microwave-safe lid or plastic wrap, leaving a small vent for steam to escape.
- Heat on medium power for 2-3 minutes, then stir.
- Continue heating in 1-minute intervals until the potatoes are hot throughout.
Stovetop Method:
- Place the leftover potatoes in a non-stick skillet.
- Add a splash of milk or cream to keep them moist.
- Cover the skillet with a lid and heat on low, stirring occasionally.
- Cook until the potatoes are warmed through, about 10-15 minutes.
Air Fryer Method:
- Preheat your air fryer to 350°F (175°C).
- Place the au gratin potatoes in the air fryer basket.
- Heat for 5-7 minutes, shaking the basket halfway through to ensure even heating.
- Check to make sure the potatoes are hot and the top is crispy.
Essential Tools for This Recipe
Oven: Used to bake the au gratin potatoes at the specified temperature to achieve a tender and golden brown top.
Saucepan: Essential for melting butter and preparing the sauce by combining flour, salt, pepper, and milk.
Whisk: Helps in stirring the sauce mixture to ensure it is smooth and thickened without lumps.
Baking dish: A greased dish where the layered potatoes and sauce are assembled and baked.
Knife: Used to thinly slice the potatoes for even cooking and layering.
Cutting board: Provides a stable surface for slicing the potatoes.
Measuring cups: Necessary for accurately measuring the milk and grated cheddar cheese.
Measuring spoons: Used to measure the exact amounts of salt, pepper, and flour.
Grater: For grating the cheddar cheese to be sprinkled on top of the dish.
Aluminum foil: Used to cover the baking dish during the initial baking period to ensure even cooking.
Oven mitts: Protects your hands when handling the hot baking dish from the oven.
Time-Saving Tips for This Recipe
Pre-slice potatoes: Use a mandoline slicer to quickly and uniformly slice the potatoes.
Pre-make sauce: Prepare the sauce ahead of time and store it in the fridge until ready to use.
Use pre-shredded cheese: Save time by using pre-shredded cheddar cheese instead of grating it yourself.
Microwave potatoes: Partially cook the potatoes in the microwave for a few minutes to reduce baking time.
Assemble in advance: Assemble the au gratin potatoes the night before and store in the fridge, then bake when needed.

Au Gratin Potatoes
Ingredients
Main Ingredients
- 4 cups thinly sliced potatoes
- 1 cup grated Cheddar cheese
- 1 cup milk
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 1 teaspoon salt
- ½ teaspoon black pepper
Instructions
- Preheat oven to 400°F (200°C).
- In a saucepan, melt butter over medium heat. Stir in flour, salt, and pepper until smooth. Gradually add milk, stirring constantly until thickened.
- Layer half of the potatoes in a greased baking dish. Pour half of the sauce over the potatoes. Repeat layers.
- Sprinkle cheese on top. Bake, covered, for 30 minutes. Uncover and bake for an additional 30 minutes or until potatoes are tender and top is golden brown.
Nutritional Value
Keywords
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