Cody Casey
Potato gratin is a delicious, indulgent side dish that is perfect for holiday dinners or any festive occasion. Traditionally, it takes about an hour to bake in an oven, but an air fryer significantly cuts down on the cooking time. In this article, we will be discussing how to cook potato gratin in an air fryer, the ingredients required, and the step-by-step process to make this mouth-watering dish.
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What You'll Learn
Choosing the right potatoes
When it comes to choosing the right potatoes for your air fryer gratin, there are a few things to consider. Firstly, it is important to select potatoes that are suitable for gratin in general. Secondly, you'll want to choose potatoes that will cook well in the air fryer.
For potato gratin, starchy potatoes are generally recommended. Starchy potatoes have a higher starch content, which contributes to a creamier texture when cooked. This is ideal for gratin, where you want the potatoes to be soft and tender. Yukon Gold and Russet potatoes are good options, especially if you are based in the US. These varieties have a naturally creamy texture and a golden hue, which can enhance the colour of your gratin.
If you are unable to find Yukon Gold or Russet potatoes, there are other varieties that can work well. Look for potatoes with a similar starch content, such as Maris Piper or King Edward. These varieties are widely available and are known for their fluffy texture when cooked, which can add a nice contrast to the creamy sauce in your gratin.
When preparing your potatoes, be sure to slice them thinly. This will ensure that they cook evenly and become tender in the air fryer. An even thickness will also help to create a consistent texture in your final dish. You can use a knife or a mandolin to achieve thin, even slices.
In addition to the type of potato, the way you prepare them can also impact the final dish. Some recipes suggest peeling the potatoes before slicing, while others leave the skin on. Peeling the potatoes will result in a more uniform appearance and texture, while leaving the skin on can add a rustic touch and some extra fibre.
By choosing the right type of potato and preparing them appropriately, you can ensure that your air fryer potato gratin turns out perfectly. With the right ingredients and techniques, you'll be well on your way to creating a delicious and indulgent side dish.
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Preparing the sauce
To prepare the sauce for your potato gratin, you will need butter, cream, garlic, sea salt, and pepper. Some recipes also include onions, thyme, stock powder, nutmeg, and cheese.
First, heat some butter in a small pot. Add in the finely diced onions and cook until they are soft. Stir in the minced garlic and cook for an extra couple of minutes. Next, add in the cream, nutmeg, salt, and pepper. Bring the mixture to a low simmer and keep on the heat for 5 minutes to let the cream thicken. Take the pot off the heat and stir in the cheese. Set the sauce aside.
Alternatively, you can make a simple roux with butter and flour to create a creamy cheese sauce. Melt the butter over medium heat and whisk in the flour until smooth, which should take about 1 minute.
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Layering the potatoes
When layering the potatoes, it is also important to season each layer. A sprinkle of salt, garlic powder, and pepper can be added, along with a tablespoon of cream. Some recipes suggest adding onions, nutmeg, and thyme leaves to the layers for extra flavour.
After layering the potatoes, a thin layer of cheese can be added on top. This can be gruyere, parmesan, or cheddar cheese, depending on your preference. The cheese will form a crispy crust on top of the gratin as it cooks.
Once the potatoes and cheese have been layered, they should be covered with baking paper and then foil before placing them in the air fryer. This will help to ensure even cooking and prevent the potatoes from drying out.
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Cooking time and temperature
The cooking time and temperature for potato gratin in an air fryer vary depending on the recipe and the type of air fryer being used. Some recipes suggest cooking at 350 degrees Fahrenheit for 20 minutes, while others recommend 360 degrees Fahrenheit for 30 to 35 minutes. The cooking time can also depend on the thickness of the potato slices and the number of layers in the dish. For example, a recipe with thinner potato slices and more layers may require a longer cooking time of 35 minutes at 180 degrees Celsius, followed by an additional 10 minutes at the same temperature without foil.
It is important to note that the cooking time may vary depending on the brand and model of the air fryer, so it is always a good idea to keep an eye on the potatoes while they are cooking. Additionally, some recipes recommend letting the potatoes rest for about 5 minutes after cooking, as this helps the cream sauce thicken.
When reheating leftover potato gratin in the air fryer, the temperature and cooking time may differ from the initial cooking instructions. To reheat, cover the dish with foil and place it in the air fryer at 360 degrees Fahrenheit for 5 to 10 minutes, or until warmed through.
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Reheating and storing
If you have leftovers, place them in an airtight container and store them in the refrigerator. They can be refrigerated for up to 3-4 days. To freeze leftovers, transfer the potato gratin to a freezer-safe container or zip-top bag. They can be frozen for up to 2-3 months.
When you're ready to enjoy your frozen potato gratin, thaw it in the refrigerator before reheating. To reheat in the oven, transfer the gratin to an oven-safe dish, cover with foil, and bake at 180°C / 160°C fan / 350°F for 15-20 minutes, or until thoroughly heated.
To reheat in the air fryer, transfer the gratin to an oven-proof dish, cover with foil, and air fry at 360°F for 5-10 minutes, or 180°C for 5-9 minutes, until heated through. The time required will depend on the size of the portion you are reheating.
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Frequently asked questions
It takes around 20-25 minutes to cook potato gratin in an air fryer, compared to about an hour in a conventional oven.
Set your air fryer to 325°F or 350°F. If you're using a different temperature scale, that's 160°C or 180°C.
You'll need potatoes, cream or milk, butter, flour, cheese, and seasonings like salt, garlic, nutmeg, and pepper.
