In a mixing bowl, combine the sugar, salt, ground cinnamon, fresh thyme leaves, white pepper, minced garlic, and olive oil. Stir until well mixed, creating a fragrant marinade.
Add the chicken tenders or cut chicken breasts to the marinade, ensuring each piece is well coated. Cover and let it marinate in the refrigerator for at least 30 minutes.
While the chicken is marinating, soak the wooden skewers in water for at least 30 minutes.
Once the chicken has marinated, thread the chicken pieces onto the soaked skewers, leaving space between each piece.
Preheat your grill or grill pan over medium-high heat. Grill the skewers for about 10-12 minutes, turning occasionally, until cooked through.
Remove the skewers from the grill, let them rest for a few minutes, and garnish with fresh thyme or parsley before serving.