Place chicken and marinade ingredients in a large bowl or zip-lock bag and toss to combine. Place in the refrigerator and marinate for at least 8 hours.
Preheat the grill to medium-high heat. Remove the chicken from the marinade and place on the grill. Cook chicken for 10 minutes, then flip and grill another 5 minutes or until the chicken is cooked through to 165 degrees. Remove the chicken from the grill and allow to rest for about 5 minutes, then slice.
Meanwhile, place the avocado cream sauce ingredients in a blender or food processor and blend until smooth and set aside.
Warm the corn tortillas in a pan or on the grill.
Assemble tacos with the warmed tortillas, chicken, shredded cabbage, salsa, cilantro, cojita cheese, and avocado cream sauce.
Notes
You can sub in plain Greek yogurt instead of sour cream for a healthier avocado cream sauce.
Marinating isn’t essential but provides a lot more flavor for the chicken.
I grilled the chicken on my Traeger at 400 degrees.
Store the cream sauce for up to 2 days in the refrigerator in an airtight container. After that, it starts to turn brown. Store sliced chicken for up to 3 days in the refrigerator.
Other great toppings: lettuce, avocado, Mexican cheese, hot sauce, red onion, refried beans, black beans, etc.