Experts caution against using air fryers instead of ovens

Air Fryers Are Not Mini Ovens

Despite their name, air fryers don’t actually “fry” food. They work by circulating very hot air at high speed, similar to a convection oven—but on a much smaller scale. That difference in size matters.

“Air fryers heat food quickly, but they don’t always heat it evenly,” explains appliance specialist Dr. Karen Holt. “An oven provides consistent, surrounding heat, which is critical for many types of cooking, especially baking, roasting large cuts of meat, or cooking multiple dishes at once.”

Because of their compact cooking chambers, air fryers can easily create hot spots. Foods may appear browned on the outside while remaining undercooked inside—particularly meats, frozen foods, and thick items.

Food Safety Concerns

One of the biggest expert concerns is food safety. Undercooked poultry, seafood, or reheated leftovers can harbor harmful bacteria if they don’t reach safe internal temperatures.

“Ovens allow better temperature control and monitoring,” says registered dietitian Laura Mendes. “With air fryers, people often overcrowd the basket, which restricts airflow and prevents food from cooking thoroughly.”

Many air fryer users also rely on visual cues—like crispiness or color—rather than using a thermometer. Experts warn this can be misleading, especially with foods like chicken breasts or casseroles that require sustained heat.

Nutritional Trade-Offs

Air fryers are frequently praised as a healthier alternative because they require little to no oil. While that’s often true, experts caution that “healthier” depends on how the appliance is used.

“High temperatures over short periods can increase the formation of certain compounds, like acrylamide, especially in starchy foods such as potatoes,” Mendes notes. “Ovens allow more flexibility with lower-temperature, longer cooking methods that may reduce this risk.”

Additionally, air fryers tend to encourage highly processed convenience foods—frozen fries, breaded snacks, and reheated leftovers—because they cook quickly and taste crispy. Ovens, by contrast, are better suited for whole-food meals like roasted vegetables, whole grains, and baked dishes.

Limited Capacity and Versatility

While air fryers excel at small batches, experts say their limited capacity can be a drawback for families or meal prep.

“Cooking multiple portions in an air fryer often requires several rounds,” says Holt. “That can cancel out the time and energy savings people expect.”

Traditional ovens also offer more versatility. They handle baking bread, slow-roasting meats, cooking casseroles, and preparing multiple dishes simultaneously—tasks that are either difficult or impossible in most air fryers.

Energy Efficiency Isn’t Always Clear-Cut

Air fryers are often advertised as more energy-efficient than ovens, but experts say the reality is nuanced.

“For a small portion, an air fryer uses less energy,” Holt explains. “But if you’re cooking for more than one or two people and running the air fryer multiple times, a conventional oven may actually be more efficient overall.”