Preheat oven to 425 degrees. Line a 9x13-inch baking pan with aluminum foil.

Combine the brown sugar and Italian dressing mix. Coat both sides of the chicken with the brown sugar mixture. Place in prepared pan. Top chicken with any remaining brown sugar mixture.

Bake for 20 minutes. Turn broiler on HIGH. Broil chicken until brown sugar caramelizes, about 1 to 2 minutes. Watch it carefully so it doesn't burn!