👩‍🍳
Airfryer opskrifter mofibo og airfryerkogebogen

Onion tart in the Air Fryer

Hearty onion tart – French classic with caramelized onions and a crispy tart base

Discover a perfect combination of sweet onions and a crispy tart base in just 30 minutes in your air fryer. The onion tart is quick, easy and full of flavor – the perfect everyday dish!

July 17, 2026
Rating: 0.00
(0)

Onion tart in the air fryer is one of those dishes that combine simplicity and flavor in a fantastic way. The mild sweetness of the caramelized onions meets a crispy tart base, and when it all comes together with eggs and cheese, you get a dish that’s both hearty and delicious. But what happens when you take the traditional onion tart and cook it in an air fryer? You save time, get a lighter and more even bake, and skip turning on the oven. In this article, we’ll explore the onion tart in a modern context – made in an air fryer – as well as the different variations and the history behind this classic tart.

Try our premium recipes FREE for 3 days

Advertisement: The page displays ads and contains advertising links (affiliate links). See our advertisers here.

Estimated reading time: 7 minutes

Why make onion tart in the air fryer?

Benefits of the air fryer

The air fryer has found its way into many kitchens thanks to its ability to cook food quickly and with less fat. Many people associate the air fryer with deep-fried food, but it’s far more versatile than that. It works like a small convection oven, meaning it can quickly bake, roast and toast food using circulating hot air. That makes it a natural choice for tarts, like onion tart.

Here are some of the benefits of making onion tart in an air fryer:

I recommend this elegant white wine for our onion tart

Onion tart has a natural sweetness from the caramelized onions and a rich, creamy texture from eggs and crème fraîche – and that calls for a white wine with freshness and acidity that can cut through the richness and bring out the sweetness. A dry, mineral Soave does exactly that: it brings a lovely balance with its light fruitiness and clean finish. I can warmly recommend iLatium Morini Le Calle Soave 2023 – an Italian classic from Veneto that pairs perfectly with a rich, flavorful onion tart from the air fryer.

  • Time savings:The air fryer heats up faster than a traditional oven, reducing the cooking time.
  • Energy savings:Since the air fryer is smaller, it also uses less energy, making it more eco-friendly.
  • Even baking:The circulating heat ensures an even bake of the tart.
  • Flexibility:The air fryer makes it possible to prepare small portions, which is perfect for smaller households or quick meals.

Healthier tart

One of the great benefits of making tarts in an air fryer is that you can use less fat while still achieving a crispy crust. This makes the tart a little lighter than a traditional tart, which often uses more butter or oil to achieve the same crispiness.

Where does onion tart in the air fryer come from?

The tart’s history

Tarts have a long history that goes all the way back to antiquity, when Greeks and Romans made simple wheat tarts filled with various ingredients. In the Middle Ages, tarts became popular in Europe, where they were used as a practical meal for both rich and poor. The earliest tarts often had a thick crust made of dough that mostly served as a container for the filling. This dough was often so hard that it wasn’t eaten, but used solely to hold the filling during baking.

Onion tart and its origins

Although tarts have a long history, onion tart is a dish especially associated with French cuisine. In the Alsace region of northeastern France, onion tart, also known as “Tarte à l’oignon,” is a classic. This tart is filled with caramelized onions, eggs and cream, giving it a rich and creamy flavor. The dish is a great example of how French cooking uses simple ingredients to create rich and flavorful dishes.

Onion tart was originally eaten as an everyday dish, where ingredients like onions and eggs were easy to find and cheap. Today, the tart has become more widely popular and can be found in many different variations and countries.

What variations can you make of onion tart in the air fryer?

Onion tart is a versatile dish that can easily be adapted to different taste preferences and diets. Here are some variation ideas you can try:

1. Adding meat

If you want a heartier tart, you can add meat to the recipe. Here are some popular choices:

  • Bacon:Add crispy fried bacon for an extra dimension of flavor.
  • Ham:Diced ham can add a salty, rich flavor.
  • Chorizo:If you want to add a spicy twist, chorizo can be an excellent addition.

2. Vegetarian variations

For those who prefer a vegetarian version, it’s easy to experiment with different vegetables.

  • Spinach:Fresh spinach can be added to the filling to give a fresh, green flavor.
  • Mushrooms:Mushrooms, especially button mushrooms, pair well with onions and give the dish more umami.
  • Tomato:Slices of fresh tomato on top can add both color and a tangy contrast to the sweet onion filling.

3. Gluten-free tart

If you’re gluten intolerant, you can use a gluten-free tart dough or replace the traditional dough with a base made from chickpea flour, cauliflower or another gluten-free base.

4. Cheese types

Cheese plays an important role in the onion tart, but you can vary the type of cheese depending on taste:

  • Cheddar:A sharp cheddar gives a rich and bold flavor.
  • Gruyère:For a more classic French flavor, try Gruyère, which is both nutty and mild.
  • Feta:Feta can add a salty, creamy texture to the tart.

5. Vegan options

It’s also possible to make a vegan version of the onion tart by replacing some of the animal-based ingredients:

  • Replace the eggs with chickpea flour:Or another egg substitute.
  • Use vegan cheese:Instead of regular cheese.
  • Swap the cream for plant-based alternatives:Such as coconut milk, oat cream or soy cream.

Try adding a splash of balsamic vinegar to the onions while they caramelize. It brings out the sweetness in the onions and gives the tart extra depth and a rich flavor that takes the dish to a new level

Tips and tricks from the author: Morten Jensen

How to adapt onion tart in the air fryer to your air fryer

Although most air fryers have a built-in baking function, there are a few things you should consider when making onion tart in an air fryer:

  • Watch out for overcrowding:The air fryer is smaller than a regular oven, so make sure the tart pan fits.
  • Check the temperature regularly:Air fryers can sometimes cook things faster than a regular oven. Keep an eye on the tart to avoid burning it.
  • Baking time:Start with the recommended time, but keep in mind that air fryers can vary in baking time. Poke the center of the tart to make sure it’s cooked through.

Conclusion onion tart in the air fryer

Onion tart in the air fryer is a fantastic way to combine traditional cooking with modern technology. The crispy crust and soft filling make the tart a versatile dish that can be served as either a main course or a side dish. By making the tart in an air fryer, you save both time and energy, and the result is just as delicious as in a traditional oven. At the same time, you can play around with different variations of the dish, whether you want to add meat, experiment with different cheeses or try a vegan version. So next time you’re looking for an easy and tasty dish, try an onion tart in your air fryer – you won’t be disappointed!

Recipe

Savory onion tart from the air fryer

Onion tart in the Air Fryer

Morten Jensen
A delicious and simple onion tart that’s quick and easy to make in the air fryer. Perfect as a light main course or side dish.
Rate this recipe
Ingen bedømmelser endnu
Add recipe to your favorites
See your favorite recipes here

Cooking Guide

Keep the screen on and follow the recipe step by step while you cook.

Step 1:

Avoid the screen turning off while you cook.

Step 2:

Start the guide and follow the recipe one step at a time.

Start step-by-step guide
Prep time 15 minutes
Cook time 25 minutes
Resting time 5 minutes
Total Time 45 minutes
Shelf life Store covered in the fridge for up to 1-2 days.
Can be frozen Not suitable for freezing; the texture and colour deteriorate.
Reheating Reheat the tart in the air fryer at 160°C for 5-7 minutes, until heated through.
Course Baking, Side Dish, Tart
Cuisine Danish
Diet
Servings 4 servings
Calories 425

Cost of the dish

Prices may vary depending on where you shop.

Our estimate is based on average food prices for the current year 2026.

Estimated price for the whole dish:

$ 10

Airfryer size

All our recipes are tested in a Philips Airfryer 2000 Series NA230/00 – 6.2 L

See the Philips Airfryer 2000 here.

Does the recipe fit my Airfryer?

If you’re unsure, you can always reduce by one serving in the recipe, or click the 0.5x button.

You can also Ask the AI Chef

It’s easy! Just press the Ask the AI Chef button you see at the bottom.

Read our official guide here.

Recommended equipment

  • Air fryer
  • Bowl
  • Whisk
  • Cutting board
  • Knife
  • Tart pan

Shopping list

Add ingredients to your shopping list

Ingredients

  • 5 pcs onions
     
  • 3 pcs eggs
     
  • 200 g grated cheese
     
  • 2 dl crème fraîchecremeFraiche ikon
  • 100 g tart dough
     
  • 1 tsp salt
  • 1 tsp black pepper
     
  • 1 tbsp olive oil
     
  • 1 tbsp fresh herbs
     

How to make it

  • Cut 5 pcs onions into thin slices.
  • Sauté the onions in 1 tbsp olive oil in a pan until soft and golden.
  • Whisk 3 pcs eggs, 2 dl crème fraîche, 1 tsp salt and 1 tsp black pepper together in a bowl.
  • Roll out 100 g tart dough and place it in the tart pan.
  • Spread the fried onions over the dough, and pour the egg mixture on top.
  • Sprinkle it with 200 g grated cheese on top.
  • Preheat the air fryer to 180°C.
    (Pre-program it, or let it run for a few minutes before cooking)
  • Bake the tart in the air fryer at 180°C for approx. 20-25 minutes, or until the tart is golden and firm.
    Start the online kitchen timer here
  • Garnish with 1 tbsp fresh herbs and serve.

Our notes for the recipe

The tart can be customised with other vegetables such as spinach or bell pepper.

Nutrition per serving (Guideline)

Nutrition information
Onion tart in the Air Fryer
Amount per serving
Calories
425
% Daily Value*
Fat
 
34
g
52
%
Saturated fat
 
16
g
100
%
Polyunsaturated fat
 
2
g
Monounsaturated fat
 
12
g
Cholesterol
 
80
mg
27
%
Sodium
 
520
mg
23
%
Potassium
 
137
mg
4
%
Carbohydrates
 
16
g
5
%
Fiber
 
1
g
4
%
Sugar
 
2
g
2
%
Protein
 
15
g
30
%
Vitamin A
 
668
IU
13
%
Vitamin B1
 
0.1
mg
7
%
Vitamin B2
 
0.3
mg
18
%
Vitamin B3
 
1
mg
5
%
Vitamin B5
 
0.4
mg
4
%
Vitamin B6
 
0.1
mg
5
%
Vitamin B12
 
1
µg
17
%
Vitamin C
 
1
mg
1
%
Vitamin D
 
0.3
µg
2
%
Vitamin E
 
1
mg
7
%
Vitamin K
 
10
µg
10
%
Calcium
 
387
mg
39
%
Iron
 
1
mg
6
%
Magnesium
 
22
mg
6
%
Phosphorus
 
277
mg
28
%
Selenium
 
11
µg
16
%
Zinc
 
2
mg
13
%
Folic acid
 
12
µg
Net carbohydrates
 
15
g
* Percent Daily Values are based on a 2000 calorie diet.

Important about shelf life and nutrition

Nutrition per serving (guideline): Calculations are based on data from the United States Department of Agriculture (USDA). Shelf life (guideline): Shelf life data is provided, as far as possible, by public institutions, including national food authorities. Our information is therefore only indicative, and it is your responsibility to obtain and calculate accurate information about shelf life and nutrition for all recipes on airfryerkogebogen.dk

Søgeord Baked goods, Baked vegetables, Tart

Easily share the recipe with others:

Via email or on Facebook

Share the recipe on Facebook
Have you tried this airfryer recipe?Leave feedback on how the dish turned out, and share your own tips. You are also always welcome to ask questions about the airfryer recipe.

Open the recipe on your phone

Scan the QR code with your phone and get the recipe directly on your mobile while you cook.

QR Code

Author

Airfryerkogebogen.dk
Airfryerkogebogens kok fremviser vores hjemmeside aifryerkogebogen.dk
Airfryer cookbook author
Morten har udgivet mere end 300 airfryer opskrifter indenfor alle måltider.
Share the love
Subscribe
Notify of
0 Kommentarer
Like 0
Close
Close