Reheating yesterday's noodles, fried meat or beans isn't always easy. A microwave can quickly reheat the food, but the previously crispy surface often becomes soft. An air fryer, on the other hand, takes longer, but the hot air can help dry out and crisp up the outer layer again.

Therefore, the air fryer is particularly useful for reheating leftovers where not only temperature but also texture is important.

This is not the better solution for all dishes: for soups, sauces, or dishes that we just want to reheat quickly, the microwave may still be more practical.

Why will the texture of food be different in a microwave and an air fryer?

The two devices heat food differently.

A microwave oven delivers electromagnetic energy to food. This energy interacts primarily with polar molecules, including water, and dissolved ions, resulting in heat.

This does not mean that a microwave oven simply heats from the “inside out.” Microwaves penetrate the food to a certain depth, and the heat generated spreads further within the material.

The main difference with crispy foods is that microwave heating does not provide an intense, dry, hot air flow around the surface . The moisture released from the food therefore more easily softens the breading, dough or the outer layer of a baked potato.

What does the air fryer do differently?

The air fryer circulates hot air around the food. This both heats the surface and helps evaporate any moisture on it.

Due to this, certain foods:

• the paneer may become drier and crispier again;
• the bottom of the pizza may brown again;
• the outer layer of a baked potato may regain some of its crispiness;
• and the skin of grilled chicken may also brown better than when heated in the microwave.

However, this does not guarantee that leftovers will be exactly the same as fresh. The structure and moisture distribution of food also change during refrigeration, so reheating may improve the texture rather than completely restore it to its original state.

Which one is better for what?

The two appliances are not necessarily rivals. The microwave oven may be better at heating quickly, while the air fryer may be better at restoring a drier, crispier surface.

At what temperature should you reheat in an air fryer?

When reheating, the goal is generally not to put the food through a full cooking cycle again, but to heat the inside while the outside regains its desired texture .

Therefore, for many leftovers, a lower temperature than the one you originally cooked at may be sufficient. However, there is no rule for every dish as to exactly how many degrees to reduce the temperature by.

The appropriate setting depends on:

• the thickness of the food;
• the initial temperature of food taken out of the refrigerator;
• the size of the portion;
• the desired crispiness;
• and the operation of the air fryer itself.

It's best to start at a moderate temperature and check the food every few minutes. If the outside is browning too quickly while the middle is still cool, reduce the heat and give it more time.

Practical starting points for common leftovers

The following values ​​are a good starting point . The exact time may vary depending on the model, portion size and thickness of the food.

Noodles

Place the noodle slices in the basket in a single layer, preferably so that air can reach the bottom and edges.

A temperature of around 150–170°C is a good starting point, with a few minutes of heating.

For thinner noodles, it's a good idea to check earlier, as the edges can dry out more quickly. For thicker dough or lots of toppings, a lower temperature and slightly longer time can help the center heat through.

Fried meat and breaded dishes

Hot air can help re-dry and toast paneer that has softened during cooling.

It's worth trying at a medium-high temperature, around 160–180 °C , and turning larger pieces halfway through.

Instead of cooking time, especially with meaty dishes, it is more important that the inside is properly heated. For thicker slices, don't just base your decision on the color of the breading.

Beans

Place the baked beans in an even layer in the iron plate and shake them once or twice while heating.

Around 160–180 °C is a good starting point, but a smaller batch can be ready in just a few minutes.

If the beans seem very dry, a little oil can help brown the surface more evenly. However, oil does not “lock in” moisture , so if you heat them for too long, the potatoes can still dry out.

For best results, it is always a good idea to check the food at short intervals, especially the first time you reheat leftovers in the appliance.

Safe reheating in an air fryer

When reheating leftovers, not only consistency is important, but also food safety and proper use of the appliance.

Use baking paper properly

Only use baking paper or paper inserts in an air fryer that are approved by the manufacturer of the appliance or in the user manual.

Lightweight paper should not be placed empty in the basket during preheating , as the strong airflow may lift it and cause it to touch the heating element.

When used, the food should be properly held in place and the paper should not unduly obstruct air circulation.

Do not pour liquid foods directly into the basket.

Soups, stews, sauces or other liquid dishes are not suitable for the perforated air fryer basket.

If the user manual of the appliance allows it, a suitable sized and heat-resistant container can be used in the oven cavity. It is important that:

• the container must stand stably;
• do not touch the heating element;
• and leave enough space for air circulation.

It is not worth inserting an unfamiliar metal grid, splash guard, or other accessory that is not designed for the appliance just to cover the food.

Internal temperature may be more important than minutes

With meat and other perishable leftovers, it's not enough to assume that the outside is already hot or crispy.

According to the USDA's food safety recommendations, leftovers should be reheated to an internal temperature of at least 74 °C , which can be checked with a food thermometer if necessary. :contentReference[oaicite:1]{index=1}

Starting values ​​for reheating common leftovers

The temperatures and times below are a guide . The exact settings will depend on the type of air fryer, the size of the portion, the thickness of the food and its starting temperature.

It's best to start with a shorter time for the first time, then continue heating for another 1-2 minutes if necessary. This way, there's less chance of the outer layer drying out or burning before the inside is properly heated through.

The air fryer can also be used for leftovers

The air fryer can be used not only for preparing fresh food, but also for reheating leftovers where it is important to maintain a crispy or browned surface.

For pizza, fried meat, fried potatoes or baked goods, hot air circulation can often give a better texture than traditional microwave heating.

However, this doesn't mean that every food should be reheated in an air fryer. For soups, sauces, or quick reheating, the microwave may still be more practical.

The most important thing for a good result is that:

• choose the right temperature for the food;
• do not heat longer than necessary;
• For meat and perishable leftovers, also pay attention to the internal temperature;
• and for the first few times, check the food at short intervals.

With a little practice, you can quickly learn which leftovers the air fryer works well with and when it's best to choose a different heating method.