1. Begin by preparing the marinade. In a medium-sized bowl, whisk together olive oil, lime juice, apple cider vinegar, minced garlic, cumin, smoked paprika, chili powder, salt, and black pepper.
2. Place the chicken breasts in a large resealable plastic bag or a shallow dish. Pour the marinade over the chicken, ensuring each piece is well-covered. Seal the bag or cover the dish, and refrigerate for at least 30 minutes, but ideally 2-4 hours for maximum flavor.
3. Preheat your grill to medium-high heat. If you don’t have a grill, a grill pan on the stove works beautifully too.
4. Once the grill is hot, remove the chicken from the marinade and place it on the grill. Discard the remaining marinade.
5. Grill the chicken for about 6-7 minutes on each side, or until the internal temperature reaches 165°F. The chicken should have a nice char on the outside and be juicy on the inside.
6. Remove the chicken from the grill and let it rest for a few minutes before slicing. Sprinkle fresh cilantro on top if desired for a burst of color and flavor.

Trust your senses here, much like my abuela taught me. The aroma will tell you when it’s just right!