PREP CHICKEN: Remove all packaging from the chicken, including giblets from the cavity. Pat the chicken very dry with paper towels. Dry skin equals crispy skin.
MIX SEASONING: In a small bowl, combine 1 tablespoon kosher salt, 1 teaspoon fresh ground black pepper, ½ teaspoon dried thyme, 1 teaspoon smoked paprika, 1 teaspoon garlic powder, and 2 tablespoons extra virgin olive oil. Stir until it forms a paste.
STUFF CAVITY: Place the quartered onion, crushed garlic, and fresh thyme sprigs inside the cavity.
LOOSEN SKIN: Gently slide your hand under the breast skin to loosen it, starting near the legs. Be careful not to tear it.
MAKE GARLIC BUTTER: In a small bowl, mix 4 tablespoons softened salted butter, 2 cloves minced garlic, ¼ teaspoon kosher salt, and ¼ teaspoon fresh ground black pepper until smooth.
SPREAD BUTTER: Spread the garlic butter evenly under the loosened skin directly onto the breast meat.
SEASON OUTSIDE: Rub the seasoning mixture all over the outside of the chicken, coating both sides evenly.
PREP AIR FRYER: Lightly spray the air fryer basket with oil spray that does not contain propellant. Tie the legs together with kitchen twine if desired.
COOK: Place the chicken breast-side down in the basket. Air fry at 360°F for 30 minutes. Carefully flip the chicken breast-side up and cook for another 25 to 30 minutes, until the thickest part of the thigh reaches 165°F.
CRISP (OPTIONAL): For extra crispy skin, increase the temperature to 370°F for the last 5 minutes.
REST: Transfer the chicken to a cutting board and let rest for 10 to 15 minutes before carving.
CARVE AND SERVE: Slice and serve warm.
Notes
Air Fryer Size: A 5.8-quart basket is ideal for a 4 to 4 ½ pound chicken. Smaller baskets may not fit the bird properly.Chicken Size Tip: Keep your chicken under 4 ½ pounds for best airflow and even cooking.Food Safety: Always wash hands and surfaces after handling raw chicken.Storage: Store leftovers in an airtight container in the refrigerator for up to 4 days.Freezing: Freeze cooked chicken in a freezer-safe bag for up to 3 months. Thaw overnight in the refrigerator before reheating.Reheating: Reheat in the air fryer at 350°F for 5 to 8 minutes or until warmed through.Serving Ideas: Slice for salads, sandwiches, casseroles, or serve alongside roasted vegetables.