How To Make A Perfect Cheese And Onion Toastie In The Air Fryer

We just can't get enough of air fryer toasties! And our cheese and onion toastie, air fried to perfection is just beyond delicious!

You'll be ditching the toastie maker and using the air fryer to make your toasties every single time!

The middles inside are so gooey and melty and oozy, the bread is crisply toasted and golden brown, these cheese and onion toasties are packed with flavor and just a treat to eat!

We think you'll love this air fried twist on a classic!

Making Cheese And Onion Toasties In Air Fryer Is A Good Thing, Here’s Why! 

Quick and easy! – air fryer toasties are really easy to make and you’ll be eating this in less than 10 minutes. 

You can add extra fillings – if you fancy any extras? Just tuck them between the bread slices in amongst the cheese and onions. 

Versatile – you can make these with whatever bread, cheese or onions you like. Add your own variations and really create your own delicious sandwich.

Cheese And Onion Toastie In Air Fryer Recipe 

Makes  – 1 toastie – easy to make more

Prep Time – 2 mins 

Cooking Time – 6-8 minutes

Total Time – 10 minutes 

Our Most Popular Alternative – Air Fryer Ham And Cheese Toastie

Equipment Needed

• Air Fryer – we now use a Ninja Foodi Max Dual Zone Air Fryer – the 9.5 litre two drawer cooking space is BRILLIANT when you’re cooking for a family or cook larger portions. And it makes cooking meat, chicken or fish and potatoes at the same time super easy! Plus if you’re doing a a cheese and onion toastie in Ninja air fryer you can cook two at once!

• Bread board 

• Cheese grater 

• Butter knife 

• Small bowl 

• Teaspoon

• Tablespoon

• Tongs – just makes it easier to lift the cheese and onion toastie from the air fryer basket. I’d definitely recommend you get yourself a set of silicone tongs if you do lots of air frying. They just make it so much easier to remove or flip food. Plus they don’t scratch the air fryer non-stick coating.

Grab our guide to Air Fryer Accessories You Actually Need (and will use) right here!

Ingredients For Cheese And Onion Toastie In Air Fryer

You’ll just need a handful of delicious ingredients to make these cheese and onion toasties in the air fryer PERFECT!

• Thick white bread – for making cheese and onion toasties, we always use a rustic bloomer style bread. But you can use different types of bread if you prefer. Sourdough bread is delicious for toasties.

• Butter – toasties should always be made with a layer of butter (proper salted butter) they just make the outside of the grilled cheese sandwich crisp up deliciously in a way that plant based spreads never seem to do. Honestly, you don't want to skip this!

• Mayonnaise & Dijon Mustard – spreading a generous layer mustard mayo mixture onto the bread, helps the sandwich stick together better as it air fries, and is just super tasty.

• Grated Cheddar Cheese – Cheddar is a really good melting cheese, that works so well in toasties and grilled cheese sandwiches. We use a nice sharp and tangy mature Cheddar. You can swap this for any type of cheese you prefer though or do a mix of cheeses. You can swap this for cheese slices if you prefer.

• Onions – okay when it comes to the onions, you can use raw diced brown onion (this is our fave) or you can use caramelised onions or go for a Ploughman's pickle style relish. They all taste amazing, so you need to try each one and choose your favourite!

Nutritional information- for ingredient quantities, calorie count, carbohydrates, protein and full nutritional content – see recipe card below

How To Make Cheese And Onion Toastie In Air Fryer

You’ll LOVE how simple these delicious grilled cheese and onion sandwiches are to make

Step One – make up the cheese and onion toasties

• Firstly, take your slices of bread and spread a layer of butter onto one of them. Then place it butter side down onto the board. 

• Mix the mayonnaise and mustard together. 

• Then spread the upper side of the ‘butter side down’ bread with half the mustard mayonnaise mixture. 

• Then add half the grated cheese, then the finely diced onions then sprinkle the rest of the grated cheese on top of the onions.

• Spread the other slice of bread with the remaining half of the mustard mayonnaise mixture. And squash it mayo side down onto the cheese and onion filling. 

• Press the sandwich together using your hand on the top slice of bread. Then spread the top of the sandwich with butter. 

Step Two – cook the cheese and onion toastie in the air fryer

• Place the sandwich into the air fryer tray in the air fryer basket.

• Then air fry for 6-8 minutes at 200C or until the toastie is golden brown on the outside. Flip the sandwich using the tongs after around 3-4 minutes of cooking.

Step Three – serve your cheese and onion toastie

• Use the tongs to remove the toastie from the air fryer basket. Slice into two halves so that the melty cheese oozes out and serve with your favourite sides.

For full instructions see recipe card below

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What To Serve With Air Fryer Cheese And Onion Toasties

Any of the following side dishes go great with a cheese toastie!

• Soup – grilled cheese dipped into a bowl of tomato soup or a rich and delicious carrot and lentil soup is a nothing but a GOOD THING!

• Apple Coleslaw – a fresh and crunchy Autumn apple slaw is great with grilled cheese sandwiches

• Potato Salad – there's always room on the plate for double carbs!

• Baked Beans – cheese and onion toasties are a perfect match with a pot of beans, and… even better if you get the cans with the mini sausages in too! 
• Tomato And Cucumber Salad – need to balance the carb fest with salad? This one is super easy!

Get all our air fryer snack recipes here

Tasty Tips From Our Kitchen To Make Your Cheese And Onion Toastie In Air Fryer Perfect Every Time!

Don’t skip the mayo! Trust us, the mayo layer is key to keeping the sandwich stuck together in the air fryer, don’t skip it. We've tried and tested, and this is the BEST method!

Keep an eye on the toastie – check your toastie for the perfect golden brown crispiness from 5 minutes on. That way you’ll catch it at the level of toasty golden brown crispiness you like. 

Be generous with the cheese – don’t skimp on the cheese, you want melty, delicious ooze!

Add extra ingredients - if you want to add some extras, you go right ahead. Try thinly sliced peppers (or those antipasti peppers from a jar) add in some bacon or ham. Sprinkle in some garlic powder or fresh thyme leaves. Chopped fresh spinach or even avocado slices. We love toasties with egg on too!

Try different types of cheeses - you can switch the Cheddar for any cheese you prefer. Or use a combination of cheeses. Try Swiss cheese, havarti, Edam, provolone, Monterey jack, Red Leicester or a crumbly Lancashire.

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More Delicious Air Fryer Snack Recipes To Try 

• Frozen Hash Browns In The Air Fryer
• Air Fryer Baked Camembert
• Air Fryer Quesadilla With Refried Beans And Cheese
• Air Fryer Sausage Rolls
• Air Fryer Tuna Melt Bagel
• Air Fryer Crispy Tofu
• Air Fryer Tuna Melt Wraps