Preheat oven to 120°C or 250°F, fan-forced. Line a baking tray and place an oven proof wire rack on top.
Add all rub ingredients to mixer bowl (except chicken) and mill for 20 sec/speed 9/MC on.
Pat chicken with kitchen paper so that they are as dry as possible and put in a large bowl.
Toss chicken through rub in bowl and place on rack in a single layer (its ok if they're touching, they shrink) to cook in the oven at 120°C or 250°F for 30 minutes.
Increase oven temperature to 220°C or 430°F and cook for a further 30 minutes or until an internal temperature of 74°C - 94°Cor 165°F - 200°F is reached. Alternatively cook in the airfryer in batches at 200°C for 17-20 mins turning halfway, until chicken is cooked.
Chubbymixers - If you were wanting to have Fried Chicken.... replace baking powder with 2 cups of white flour and 1 Tbsp salt. Soak in buttermilk for 2 hours, then coat in flour mixture. Opt to either bake, pan-fry or deep fry.