Four-time barbecue world champ Myron Mixon formulate some St. Louis spareribs at the MUNCHIES Test Kitchen Area. He shows us how to make a homemade marinade, rub, and barbecue sauce to accomplish barbecue perfection in the house without a fancy setup– all you require is a charcoal grill, no smoker required. Just grab your ingredients and a cold drink, light the grill, and follow along at home for the supreme summer season barbecue meal. Check out the…