Pound the chicken to an even thickness if needed. Then go to butterfly chicken, but cut in half completely down the middle to make two thinner breasts from each breast.
Spray both sides of the chicken with cooking spray. Then season both sides with the seasoning mix, pressing down with your fingers to get it to stay on.
Transfer chicken to a plate or cutting board and let rest for at least 5 minutes before cutting (this will help keep it juicy). Serve with more BBQ sauce if desired and enjoy!