What Is the Main Use of an Air Fryer? Everything You Need to Know

You just pulled one out of the box. Or maybe a friend won’t stop talking about theirs. Either way, you’re wondering: what does this thing actually do?

I’m Chef Emma, and I’ve been cooking professionally for over 15 years. I’ve tested air fryers in home kitchens, restaurant prep settings, and everything in between. Here’s the honest truth about what an air fryer is best at — and when it might not be the right tool.

By the end of this guide, you’ll know exactly what an air fryer does, how it works, what you can cook in it, and whether it belongs in your kitchen.

What Does an Air Fryer Actually Do?

An air fryer cooks food by blasting it with superheated air from all angles. A powerful fan forces hot air around the food at high speed. This rapid circulation creates a dry, intense heat that crisps the outside while cooking the inside evenly.

The result? Golden, crunchy food that tastes deep-fried — but without the oil bath.

Think about how a convection oven works. An air fryer does the same thing, just much faster and in a smaller, more focused space. That compact design is what makes the heat more intense and the cooking time shorter.

Traditional deep frying submerges food in hot oil — usually 2 cups or more. An air fryer needs just a teaspoon or tablespoon of oil, if any at all. That’s the core difference, and it’s a big one. Most nutrition experts and cooking authorities agree this makes air-fried food considerably lower in fat and calories than its deep-fried counterpart.

Now let’s look at all the things you can actually use it for — because it’s more than just fries.

What Are the Main Uses of an Air Fryer?

The air fryer handles more cooking tasks than most people realize. It’s not a one-trick appliance. Here are the six core uses that cover 90% of what most home cooks need.

1. Frying Without Oil

This is the original reason air fryers became popular. French fries, onion rings, mozzarella sticks, chicken tenders — all of them come out crispy and golden with just a light spray of oil.

You probably already know this works. What most people don’t realize is how well it works. A 2025 review published on Medical News Today confirms that air-fried foods have significantly lower fat content than deep-fried versions, with no real sacrifice in texture when done correctly.

So if you’ve been skeptical — the results genuinely hold up. The crunch is real.

2. Roasting Vegetables

This is where air fryers shine brightest for everyday cooking. Broccoli, Brussels sprouts, zucchini, sweet potato — they all roast beautifully in 10 to 15 minutes at 375°F to 400°F.

When I started roasting vegetables in my air fryer instead of the oven, I cut my prep time in half. The edges get caramelized and slightly crisp in a way that takes 35 to 40 minutes in a full oven. In the air fryer, it happens in 12 to 15 minutes. That single change made me eat more vegetables — because suddenly they tasted better and took no effort.

3. Cooking Protein — Chicken, Fish, and Meat

Chicken wings come out with crackling-crisp skin. Salmon fillets cook through evenly in about 10 minutes. Pork chops, steak, and shrimp all do well with the right temperature and timing.

The key is not overcooking. Proteins dry out fast in an air fryer’s intense heat. A meat thermometer is your best friend here — pull chicken at 165°F and fish at 145°F.

4. Reheating Leftovers

This might be the most underrated use. Pizza, fried chicken, spring rolls — the air fryer brings them back to life. The microwave makes leftovers soggy. The oven takes too long. The air fryer reheats in 3 to 5 minutes and restores the crunch.

Once you reheat pizza in an air fryer at 350°F for 3 minutes, you’ll never use the microwave for it again. Seriously.

5. Baking

Yes, you can bake in an air fryer. Small cakes, muffins, cookies, and even brownies come out well in most models. You’ll need oven-safe ramekins or small baking pans that fit the basket.

Results vary more than with frying or roasting. The closer the food is to the heating element, the faster the top can brown. Keep an eye on it and reduce the temperature by about 25°F compared to standard oven recipes.

6. Dehydrating

Many modern air fryers include a dehydrate mode that runs at low temperatures (around 105°F to 175°F) for several hours. This lets you make beef jerky, dried fruit, vegetable chips, and herb powders at home.

It’s slower than the other functions, but it’s a genuine bonus if you like snack prep or want to preserve seasonal produce.

That covers the main functions. But here’s something that trips up a lot of new air fryer owners — and it’s worth clearing up before you start cooking.

What Most People Get Wrong About Air Fryers

A lot of confusion surrounds air fryers. Here are the three most common misconceptions — and the real truth behind each one.

Myth 1: “It’s the same as a convection oven.”

Not quite. A convection oven uses fans to circulate hot air — but across a large, open space. An air fryer concentrates that same airflow into a tiny, enclosed basket. The result is faster cooking and a crispier surface than most convection ovens can achieve. Think of it as a turbo version designed specifically for crunch.

Myth 2: “Air-fried food tastes exactly like deep-fried food.”

Close — but not identical. The texture is genuinely similar, especially the crispiness. But deep frying creates a specific richness that comes from oil absorption. Air frying can’t replicate that 100%. What it can do is give you 90% of the satisfaction with a fraction of the fat. Most people — including me — find that’s a very fair trade.

Myth 3: “Any food works in an air fryer.”

Some foods don’t do well. Wet, battered foods (like tempura or beer-battered fish) turn out soggy or drip through the basket. Large roasts need a full oven. Delicate leafy greens blow around and burn. Know the limits, and you’ll never be disappointed.

How Does an Air Fryer Work? (The Simple Version)

Inside every air fryer, there are two key components: a heating element and a high-speed fan. The heating element warms the air, and the fan drives that hot air in a rapid circular pattern around the food.

This is called rapid air technology — a term first used by Philips, the company that introduced the first modern air fryer to the consumer market in 2010. Since then, the technology has been adopted and refined by dozens of brands including Ninja, Cosori, Instant Pot, and Breville.

The basket or tray holds the food in a raised position so hot air can circulate underneath as well as above and around it. This 360-degree heat is what makes the difference. A standard oven heats from one or two directions. An air fryer surrounds the food completely — cooking it faster and more evenly.

You might be thinking: “So it’s just a small oven?” Here’s why that undersells it — the air in an air fryer moves much faster than in a standard oven. That high-speed airflow is what creates crispiness. It’s the difference between baking a potato and pressure-steaming one. Same heat source, completely different result.

Is an Air Fryer Actually Healthier?

Yes — compared to deep frying, the health case is strong. The research consistently supports this. Using far less oil means fewer calories and less fat per serving. Traditional deep frying uses 2 cups or more of oil. An air fryer uses about a tablespoon, or sometimes none at all.

According to Medical News Today’s 2025 health review, air-fried foods are meaningfully lower in fat than their deep-fried equivalents. That directly impacts calorie count, which matters for weight management and heart health.

There’s one nuance worth knowing. High-temperature cooking of starchy foods (like potatoes) can produce small amounts of acrylamide — a chemical formed when starches brown under intense heat. This happens with deep frying too, but air frying produces slightly less. To minimize it further, don’t cook until completely dark brown. Stop at golden.

The bottom line: air frying is a genuinely healthier alternative to deep frying. It’s not health food — a fried potato is still a fried potato — but the fat and calorie reduction is real and meaningful.

What Can You Cook in an Air Fryer? A Practical Food List

Here’s a clear breakdown of what works well, what works okay, and what to skip entirely.

Food Category	Works Great	Notes
Frozen snacks	✅ Excellent	Fries, nuggets, spring rolls — faster and crispier than oven
Vegetables	✅ Excellent	Broccoli, Brussels sprouts, peppers, zucchini — all thrive
Chicken (pieces)	✅ Excellent	Wings, thighs, tenders — crisp skin, juicy inside
Fish and seafood	✅ Good	Salmon, shrimp, fish fillets — watch timing carefully
Baked goods	⚠️ Moderate	Muffins and small cakes work; large items can brown unevenly
Wet-battered foods	❌ Avoid	Beer batter and tempura drip and don’t crisp properly
Leafy greens	❌ Avoid	Fan blows them around; uneven burning is likely

This covers the most common food questions. But there’s one more area where most air fryer articles stay surprisingly quiet — and it comes up next.

How to Get the Best Results from Your Air Fryer

Knowing what an air fryer does is half the battle. Using it well is the other half. These tips come from real trial and error — not just the instruction manual.

You might be thinking: “My air fryer already has a preheat button — do I still need to do it manually?” Here’s the thing — not all models signal when preheat is done accurately. Running it manually for 3 minutes at your cooking temperature ensures the basket is truly hot before food goes in. That first 60 seconds of contact heat is what starts the crisping process.

Air Fryer vs. Oven vs. Deep Fryer: Which Should You Use?

Each cooking method has a sweet spot. Here’s how they compare for everyday cooking decisions.

Method	Best For	Downside
Air Fryer	Fast, crispy, everyday meals for 1 to 4 people	Small capacity; not ideal for large batches
Conventional Oven	Large roasts, casseroles, full-batch baking	Slow preheat; less crispiness without convection
Deep Fryer	Authentic fried texture; large quantities fast	High fat, messy cleanup, oil disposal required

This article covers everyday home cooking with air fryers. If your goal is professional frying at scale or specialty baking, you’ll need different tools for those jobs. But for most people cooking daily meals at home, the air fryer covers the majority of what you need.

The Best Air Fryer to Start With in 2025

If you’re ready to buy, the Ninja AF101 is the model most beginners and experienced home cooks reach for. It has over 86,000 reviews on Amazon, a 4-quart ceramic-coated basket, four cooking functions (Air Fry, Roast, Reheat, Dehydrate), and a temperature range of 105°F to 400°F.

It’s compact, easy to clean, and powerful enough for everything covered in this article.

Is an Air Fryer Worth It?

For most households — yes. The combination of speed, crispiness, and lower fat content is hard to argue with. Meals that used to take 35 to 40 minutes in the oven are ready in 15 to 20 minutes. Leftovers that came out soggy from the microwave come out crisp. And frozen food that was edible before now tastes genuinely good.

The only honest case against buying one: if you already own a high-quality convection oven, test its built-in air fry function first. Many newer ovens include this feature, and you may not need a separate countertop unit.

For everyone else — especially if you’re cooking for one to four people on weeknights — an air fryer is one of the most practical kitchen investments available in 2025. That’s not hype. That’s the consensus among food writers, nutritionists, and everyday cooks who use one daily.

Conclusion

An air fryer’s main use is simple: it cooks food crispy using hot circulating air and very little oil. That single function covers frying, roasting, reheating, baking, and dehydrating — all in one compact machine that preheats in under 5 minutes.

The health benefits are real, the time savings are meaningful, and the results are genuinely satisfying. It’s not magic — but it comes close for everyday cooking.

Right now, pick one food you’ve been meaning to cook healthier — chicken wings, roasted broccoli, frozen fries — and try it in an air fryer this week. That one test will tell you more than any guide could. — Chef Emma

Frequently Asked Questions

Can you cook frozen food directly in an air fryer without thawing?

Yes — and this is actually the recommended approach. Cooking frozen food straight from the freezer gives crispier results. The intense heat hits the frozen surface immediately and creates a crunch that thawed food often loses.

How much oil does an air fryer actually use?

Most air fryer recipes use zero to one tablespoon of oil. Some foods — like plain vegetables or proteins with natural fat — need no added oil at all. This compares to two or more cups in traditional deep frying.

Does an air fryer heat up the kitchen like an oven?

Much less so. Because the air fryer is a small, enclosed appliance, it generates far less ambient heat than a full-size oven. It’s a practical advantage for warm climates or small apartments.

Can you put water in an air fryer to steam food?

No — and you shouldn’t try. Air fryers are designed for dry-heat cooking only. Adding water can damage the heating element and create a safety risk. If you want to steam, use a stovetop steamer or Instant Pot instead.

How do you clean an air fryer after cooking greasy food?

Remove the basket and tray and soak them in warm, soapy water for 10 minutes. Most baskets are dishwasher-safe, but hand washing extends the nonstick coating’s life. Wipe the interior of the unit with a damp cloth — never submerge the base unit.