Killer Beef Fajita Marinade Use for skirt or flank steak. Ingredients Per 1 lb. of beef: 1 bottle beer 1/4 cup fresh lime juice 2 tbs. favorite beef rub 4 cloves chopped garlic 2 tbs. Worcestershire 1 tbs. sugar 1 tbs. olive oil 2 tbs. chopped cilantro salt and pepper to taste optional: chopped jalapeno Directions Combine marinade ingredients and pour over the beef. Cover and refrigerate 8 hours, or so. Drain and discard marinade before grilling.