Place chicken tenderloins in a large shallow bowl.
Pour in buttermilk. Season with salt and pepper. Cover and place in the refrigerator for about an hour or overnight if time permits.
Preheat oven to 220 C or 450 F. Line a large baking tray with baking paper.
Place breadcrumbs in a shallow bowl. Add paprika, cajun seasoning, dried thyme, onion powder and garlic powder. Stir to combine. Season with salt.
Remove chicken from the buttermilk, one piece at a time, shake off excess buttermilk, and coat in breadcrumbs.
Transfer on to the baking tray.
Spray with oil.
Bake for about 15-20 minutes depending on the size of the tenders or until the chicken is cooked through and the tenders are light golden.
Serve with fries and mayo dip.