Are glass air fryers better? The pros, cons and what to know before buying

Glass air fryers have gone from a slightly odd niche buy to a serious alternative to the usual black drawer. Their clear bowls let you watch chips brown without pulling the basket out every few minutes and letting the heat escape.

Being able to see dinner is useful, but it doesn’t make glass automatically better. Some models are small or heavy, and some still use a coated crisper plate inside the glass container. The right air fryer depends on what you cook, how many people you feed and how much washing-up you’ll tolerate.

Mumsnet has tested several glass models in real homes, including the Fritaire Self-Cleaning Glass Bowl Air Fryer, the original Ninja CRISPi and the larger Ninja CRISPi Pro. All three had their own strengths, but none was right for every kitchen.

Are glass air fryers better? The short answer

A glass air fryer makes sense if you want to see food as it cooks, prefer a glass main cooking chamber and like containers that can sometimes go from cooking to serving, storage and the dishwasher.

That doesn’t mean it’ll cook better than a conventional basket air fryer. Results vary by model, and glass designs can be heavier, easier to break and less roomy than their advertised capacity suggests. Most also have one cooking zone, so they won’t replace a large dual-drawer air fryer for every family.

From our testing, glass models make most sense for individuals, couples and smaller families who cook one main food at a time. Larger households should check the usable cooking area and number of zones before being seduced by a handsome litre figure.

What is a glass air fryer?

A glass air fryer cooks in the same way as a standard model, by circulating hot air around food. The difference is the bowl or container you cook in.

Some, including the Fritaire, use a deep glass bowl beneath a fixed heating unit. Others, such as the Ninja CRISPi range, have a removable heating pod or base that works with interchangeable glass containers.

In everyday use, this is a bigger deal than it sounds. A removable container can usually go in the dishwasher and, with a lid, may double as leftover storage. A fixed bowl is more awkward to lift and wash, even when the appliance has a self-cleaning programme, as the Fritaire does.

Glass air fryers vs basket air fryers: at a glance

What are the benefits of a glass air fryer?

1. You can see how the food is cooking

Being able to see dinner cook is more useful than it sounds. You can check browning, spot a rogue chip heading towards cremation and see whether anything needs turning without pulling out a drawer.

For Andreas Hansen, founder of glass-air-fryer brand Fritaire, the useful bits aren’t a long list of presets. They’re visibility and clean-up.

“Being able to see your food cook through a glass bowl means you're not constantly opening the basket and losing heat,” he says.

That matched what we found in testing. Fran, who tested the Fritaire, found the transparent bowl made it easy to monitor browning. Rachel found the novelty of watching food cook in the original Ninja CRISPi hadn’t worn off after two months of regular use.

You don’t need an entirely glass air fryer to get this benefit. Some conventional drawer models have a viewing window and internal light, which gives you much the same peeking rights without a heavy glass bowl.

Image supplied by Fritaire

2. Cleaning can be easier, but check the whole design

Smooth glass wipes clean easily and has no coated interior to scratch with abrasive tools. Removable glass containers from the Ninja CRISPi range can also go in the dishwasher.

Still, some glass models are surprisingly awkward to wash. During Mumsnet’s Fritaire test, the self-cleaning cycle helped loosen residue, but the fixed bowl still needed hands-on washing and couldn’t simply be carried to the sink. On the Ninja CRISPi Pro, the glass containers were easy to clean but grease still collected on the removable crisper plates if they weren’t washed regularly.

Hansen recommends ignoring the headline feature count and asking three rather less glamorous questions: “Is it large enough for how I actually cook? Is it easy to clean? And, this one is very important, what materials touch my food?”

He’s right, but check every component rather than the bowl alone. A glass container may still be supplied with a coated plate, rack or accessory.

3. Helps to avoid traditional non-stick cooking chambers

For some shoppers, visibility is secondary. They want less coated cookware in contact with food. A glass bowl gives you an uncoated main cooking chamber, and some models pair it with stainless-steel accessories.

But don’t take “glass” or “PFAS-free” to mean the whole appliance is coating-free. Check the manufacturer’s specifications for the bowl, crisper plate, racks and any other component that touches food. If the product page doesn’t say, ask before buying.

There’s no need to turn this into a panic about conventional air fryers. Use any appliance as instructed, replace damaged components and avoid scraping coated surfaces with metal utensils or abrasive pads.

4. Some containers can cook, serve and store food

With the heating unit removed, some glass containers can go from the air fryer to the table, then into the fridge or freezer. Some can also go in the microwave, where the instructions allow it.

That means fewer dishes to wash, although you’ll still need somewhere for the heating pod, crisper plates, lids and spare container. The appliance has not abolished kitchen clutter. It has merely rearranged it.

Our tester Helen could fit a whole chicken in the Pro model

The disadvantages of glass air fryers

1. Glass is heavier, hot and breakable

A glass container is heavier than a metal drawer. That feels reassuring on the worktop, but less so when you’re carrying a hot bowl towards the sink.

Handles and lifting tools help, but the glass and metal parts still get very hot. You’ll need a heatproof surface, dry oven gloves and somewhere safe to place the heating unit or lid. Glass can also chip or break if dropped, so think about who will use the appliance and where it will be stored.

2. Capacity can be misleading

Don’t let the litre figure do all the talking. It tells you the total volume, not how much food will fit in a single layer. A deep 5.7-litre bowl may fit a whole chicken yet still feel restrictive when you want to spread out chips, vegetables or several portions of food.

“Capacity matters, but the litre measurement can be deceiving because it doesn't always reflect usable space,” Hansen says. “The real test: Can you fit a whole chicken? Can you cook enough chips for four people without stacking them?”

We found the same in testing. The 5.7-litre Ninja CRISPi Pro could cook a whole chicken beautifully, but our family-of-four tester still found it smaller than she needed for some everyday meals. The original 3.8-litre CRISPi made more sense for individuals, couples and smaller batches.

Before buying, check the container’s width and cooking surface as well as its total volume. Food crisps better when hot air can circulate around it rather than fighting its way through a heap of potatoes.

3. Most glass air fryers have one cooking zone

Interchangeable containers are useful, but they don’t necessarily give you two active cooking zones. On both Ninja CRISPi models, for example, you use one glass container at a time.

That’s fine if you normally cook one main item, reheat leftovers or make smaller meals. It’s less convenient if dinner regularly involves chicken at one temperature and chips at another. A dual-basket air fryer can run two programmes at once and synchronise the finish times.

If that sounds more like your household, read our single vs dual-drawer air fryer comparison before deciding.

Fran enjoyed testing the Fritaire - though it's fixed base made cleaning a little trickier

4. Price can be hard to justify

Glass usually costs more because of the materials, modular design or accessories. It’s only good value if you’ll use those extras.

The original Ninja CRISPi is compact and portable but has no manual temperature control. The CRISPi Pro adds proper time and temperature settings and a larger 5.7-litre container, but costs as much as some family-sized dual-zone machines. The Fritaire adds a rotisserie and tumbling basket, although those accessories also need cleaning and storage.

Hansen says the biggest buying mistake is choosing an appliance based on features that will never be used. He has a point. A rotisserie earns its keep if roast chicken is a regular event. If you live mainly on reheated pizza and chips, it’s just an unusually complicated cupboard ornament.

What to look for when buying a glass air fryer

• Usable cooking space, not just litres: Check the width and shape of the container. Look for real-food examples in reviews, such as the size of chicken it can hold or how many portions of chips can cook without stacking.

• Removable, dishwasher-safe parts: Find out whether the glass bowl detaches from the electrical base and which parts can go in the dishwasher. “Self-cleaning” can still mean rinsing, wiping and wrestling a substantial appliance around the sink.

• Manual controls: Pre-set programmes are convenient, but manual temperature and time controls give you more flexibility. This matters if you cook from recipes written for different machines.

• Every food-contact component: Check the stated material of the bowl, plate, rack and accessories. A glass container doesn’t automatically make the entire cooking system glass or stainless steel.

• The worktop footprint: Measure the full width, depth and height, including the clearance needed above and around the appliance. Also decide where the spare bowl, lids and accessories will live.

• Replacement parts: Glass can break. Check whether replacement containers, lids and crisper plates are available separately and what they cost.

Who does a glass air fryer suit?

A glass model is most likely to suit:

• People who want to watch food cook without opening a drawer

• Individuals, couples and smaller families

• Anyone prioritising a glass main cooking chamber

• Meal preppers who’ll use cook-and-store containers

• Cooks who mainly prepare one food or one meal component at a time

• People with a dishwasher and a model whose removable parts are dishwasher safe

You may be better with a conventional basket or dual-drawer model if:

• You regularly feed four or more people

• You need to cook two foods at different temperatures

• You want the widest possible cooking surface

• You’d struggle to lift a hot glass container safely

• You want maximum capacity for the money

• You don’t have room to store spare bowls, lids and accessories

The Ninja Crispi 7-in-1 comes with two glass containers for customised cooking and storage

Should you buy a glass air fryer?

Glass air fryers aren’t automatically better, healthier or easier to clean. The good ones do offer real advantages: you can see what’s happening, the main chamber is uncoated glass and removable containers can be practical for washing and storing food.

You pay for those benefits with extra weight, breakable glass and, often, just one cooking zone. Advertised litres can also flatter a deep but fairly narrow bowl.

All three models cooked well in Mumsnet’s tests, but each came with a catch. The Fritaire delivered excellent, even results and useful rotating accessories, yet its fixed bowl made cleaning more awkward than expected. The original CRISPi was compact and easy to store but small for family cooking. The CRISPi Pro was more capable and produced excellent food, but its premium price and single cooking zone still gave our family tester pause.

Choose glass if its specific benefits solve an actual problem in your kitchen. If they don’t, a straightforward drawer model from our best air fryers guide will probably do the job for less fuss and, quite possibly, less money.

Glass air fryers tested by Mumsnet

We’ve tested all three models shown below in real homes. Here’s how their ratings and key specs compare.

Frequently asked questions, answered

Are glass air fryers safer than non-stick air fryers?

A glass cooking bowl reduces the amount of coated cooking surface, but “glass air fryer” doesn’t necessarily mean every food-contact component is uncoated. Check the materials used for plates, racks and accessories, follow the manufacturer’s care instructions and replace any damaged parts. Avoid describing an appliance as “non-toxic” unless that precise claim is independently supported.

Can glass air fryer bowls go in the dishwasher?

Some can, including the removable containers supplied with the Ninja CRISPi range. Others are fixed to the electrical base or require hand-washing. Always check the instructions for your exact model rather than assuming all glass bowls are dishwasher safe.

Can a glass air fryer bowl break?

It can. Heat-resistant glass is designed for cooking, but it can still chip or break if it’s dropped, knocked or treated in a way the manufacturer doesn’t recommend. Follow the instructions on hot surfaces, washing and sudden temperature changes.

Do glass air fryers cook food more slowly?

Not necessarily, because cooking speed depends on the heating element, airflow, temperature range, food quantity and the shape of the container. In Mumsnet’s tests, the Fritaire and both Ninja CRISPi models cooked food quickly, but individual timings still varied by recipe and batch size.

About the expert

• Andreas Hansen is the founder of Fritaire, a US glass-air-fryer brand available in the UK.

About the author

Rebecca Roberts (aka Beccy) is our resident lifestyle expert with a practical focus on sleep, wellness and everyday comfort. She’s equally at home tackling frank, NSFW‑adjacent topics as she is road‑testing kitchen appliances, mattresses and vacuums that work for real parents. As a mum of two, she writes with the time‑poor, sleep‑deprived in mind - honest product reviews, realistic routines and products that make parents’ lives easier.

When she’s not at her desk, she’s probably product‑testing with her two helpers, corralling a PTA or walking her two dogs up and down country lanes.

Read next:

• Best air fryers

• Best dual air fryers

• Best air fryer ovens