An air fryer is a great kitchen appliance that can cook frozen foods in minutes. This cooking appliance is so easy to use that even children can use it. It cooks food quickly, using circulating air to brown and crisp food evenly. It also uses less power than an oven, which means it can cook more food in less time. A large benefit of an air fryer is that you can cook leftovers. As an air fryer uses very little oil, it is a healthier way to cook food than frying in deep fat. Nevertheless, you should spray oil on fried foods to get a good, even coating of breading. If you want to cook tater tots and french fries, you can use an air fryer. A single serving of these foods is enough for up to four people. Although many brands of air fryers advertise that you don't need oil, you should always use some oil. Even if your favourite frozen food already contains oil, adding some oil will help it get a great crispy finish. Moreover, using oil also keeps your food from sticking to the cooking surface, promoting browning and crispiness. You can cook most types of foods in an air fryer without oil.