The perfect fajita marinade: mix 2-3 tablespoons of fajita seasoning with 2/3 cup vegetable oil and 1/3 cup vinegar (or the juice from 3 freshly squeezed limes). Pour marinade over 3 lbs of thin strips (1/2” to 1” thick) of skirt, flank or round steak, chicken or pork and marinate in the refrigerator 4-8 hours . For shrimp marinate: 30 minutes to 2 hours. Marinate in large plastic re-sealable bags. Hand blended from cumin, paprika, cayenne, salt, black pepper, garlic, Mexican oregano, cardamom, white pepper, coriander, rosemary, marjoram and cinnamon.