Whether you're cooking chicken on a grill or a Blackstone Griddle, it's important to keep an eye on it. On a grill, if it looks like it's beginning to burn, move the pieces away from the hottest point on the grill. Using indirect heat can result in chicken that's more evenly cooked. On a Blackstone Griddle, the hottest part of the griddle is the middle. If you're concerned that the chicken is burning, move the chicken to the outside edges and lower the temperature of the burners. Keep in mind that black spots on the outside of the chicken from the grill is perfectly fine. You want to avoid a situation where the outside of the chicken is completely blackened and burned, but don't worry about black marks caused by the hot surface of the grate or griddle top.