To achieve crispy skin when making Korean fried chicken in an air fryer, the key is not the sauce, but the method of double heating. The first step is to cook the meat at medium temperature to ensure it is cooked through and to render out the fat. The second step is to increase the temperature for a short time to dehydrate the surface and make it crispy — this is the same principle as the restaurant’s “double frying” technique, which is applicable in an air fryer.
The batter should be dry
The crispiness of Korean fried chicken comes from starch, not flour. Coating with corn starch or potato starch creates a thinner and more even layer, resulting in a crispier shell than flour. After coating, let it rest for three to five minutes to ensure the batter adheres well before placing it in the air fryer, preventing it from falling off during cooking.
Do not overcrowd
An air fryer relies on hot air circulation, so if there is no space between the food, it will bake rather than fry. It is better to cook in two batches than to fill it all at once.
Add sauce at the end
Korean sweet and spicy sauce contains sugar, which can burn at high temperatures. The correct method is to toss the chicken in the sauce after frying, or to toss it in the sauce and then return it to the fryer for one to two minutes to colour it. Adding the sauce at the beginning will result in a bitter taste.
How to Perform Double Heating
| Step | Purpose | What to do after finishing |
|---|---|---|
| First time (medium heat, longer) | Cook the chicken thoroughly, render out the fat | Surface is light golden, not crispy yet |
| Cool for a few minutes | Let the surface moisture evaporate | Touch and it should no longer be wet |
| Second time (high heat, shorter) | Surface dehydrates and becomes crispy | Golden, sounds when tapped |
The actual temperature and time will depend on the model of the air fryer and the size of the chicken pieces, as there can be significant differences between air fryers — follow the recommended temperatures in your machine’s manual, focusing on the sequence of “medium long + high short”, rather than a specific number.
Frequently asked
Why is my air-fryer Korean fried chicken not crispy?
Single-stage cooking is the usual cause. Crispness comes from cooking at a medium temperature first, then a short blast of high heat that dehydrates the surface.
Should I use flour or starch for the coating?
Corn or potato starch. It gives a thinner, more even coating than flour, which is what produces the crust.
When should I add the sauce?
After frying. Korean sweet-and-spicy sauce contains sugar, which burns and turns bitter at high heat.
Can I cook a full batch at once?
No. Without room for air to circulate the chicken bakes rather than fries. Two smaller batches beat one full basket.