Combine together 1/2 cup Espresso Balsamic Vinegar, 1/2 cup Vermont Maple Balsamic Vinegar, and 1 bottle of semi-dark beer in a Ziploc bag or glass dish. Place your chicken breasts in the marinade and refrigerate for at least one hour, but the longer the better!
Grill or bake your chicken...enjoy!
(Recipe shared by Fustini's.)