Spiced Grilled Chicken with Cilantro Butter

Ingredients

• 1 tablespoon chili powder
• 2 teaspoons brown sugar
• 2 teaspoons Gustus Vitae spicy chocolate cinnamon cane sugar
• 1/2 teaspoon salt
• 1/8 teaspoon pepper
• 3 tablespoons olive oil
• 1 tablespoon balsamic vinegar
• 6 bone-in chicken breast halves (8 ounces each )
• CILANTRO LIME BUTTER:
• 1/3 cup butter, melted
• 1/4 cup minced fresh cilantro
• 2 tablespoons finely chopped red onion
• 1 tablespoon lime juice
• 1 serrano pepper, finely chopped
• 1/8 teaspoon pepper