Season the chicken thighs. Sprinkle ½ teaspoon of celery salt evenly over the chicken thighs. Set them aside.
Prepare the coating bowls. In a small bowl, mix cornstarch, leftover 1 teaspoon of celery salt, and all spices (or use your own spice mix).
In another bowl, whisk the egg until smooth.
Coat the chicken thighs. One by one, dredge the chicken thigh and roll it in the seasoning mixture, ensuring it's evenly coated.
Then using kitchen tongs, dip it into the beaten egg, making sure it's fully covered.
Finally, roll it again in the seasoning mixture, pressing the mixture gently onto the chicken. Shake off any excess coating. Repeat this process with the remaining chicken thighs.
Preheat the air fryer. Preheat your air fryer to 375 degrees Fahrenheit (190 degrees Celsius).
Place the coated chicken thighs into the air fryer basket, skin side up first. Lightly spray them with cooking oil.
Air fry the chicken thighs. Cook the chicken in the air fryer for 22-25 minutes, flipping each thigh halfway through the cooking time.
By the time chicken is cooked there may be a few spots with cornstarch, you can gently brush them or lightly spray them with cooking oil.
The cooking time may vary depending on the thickness of the chicken thighs. Ensure they are evenly cooked on both sides. Check the chicken's doneness: To ensure the chicken is fully cooked, use a kitchen meat thermometer to check the internal temperature. It should reach a minimum temperature of 165 degrees Fahrenheit (74 degrees Celsius) for safe consumption.
Enjoy the flavorful fried chicken! Once the chicken thighs are crispy on the outside and tender and juicy on the inside, they are ready to be served. Enjoy!