Pound the thicker end of the chicken to make both sides leveled out so they cook evenly.
Fill a large bowl with 6 cups of lukewarm water and add 1/4 cup Diamond Crystal kosher salt, stir to dissolve.
Add the chicken breasts to the water and let them sit, refrigerated 1 to 1 1/2 hours to brine. Remove from water, pat dry with paper towels and discard the water.
In a small bowl combine 3/4 teaspoon salt, with the remaining spices. Spritz the chicken with oil and rub all over, then rub the spice mix over the chicken.
Add the chicken to the air fryer basket and air fry in batches 380F 5 minutes on each side, 10 minutes total until browned on the outside and cooked through on the inside. See notes below for larger breasts.
Oven Method:
Preheat the oven to 350F. Heat an oven safe or cast iron skillet over high heat for 5 minutes until it is very hot.
Place the chicken on the hot skillet, and cook for 1 minute. Turn, and cook 1 minute on other side.
Transfer skillet to the oven and bake until no longer pink in the center and the juices run clear and a thermometer reads 165F inserted in the center, about 8 to 10 minutes.
Video
Notes
How Long To Cook Chicken Breast in the Air FryerThe amount of time it takes to cook chicken in an air fryer will vary based on the thickness and size of your chicken breasts. The internal temp for cooked chicken breast should be 165 degrees F.
Small Breasts (5 to 6 ounces): 8 to 10 minutes
Medium Breasts (7 to 8 ounces): 10 to 12 minutes
Large Breasts (9 ounces or more): 12 to 14 minutes
Always flip the chicken breast halfway through cooking to ensure it cooks evenly.
*Be sure your salt is Kosher in this brine. I use Diamond Crystal kosher salt which has half the sodium are Mortons. Table salt will be too salty.