01 - Combine mango, lime juice, olive oil, honey, garlic, cumin, smoked paprika, salt, black pepper, and chili flakes in a blender or food processor. Blend until completely smooth and fully incorporated.
02 - Measure out 1/4 cup of the blended marinade and transfer to a separate small bowl. Cover and set aside for basting during grilling. Keep the remaining marinade for the chicken.
03 - Place chicken breasts in a large resealable plastic bag or shallow glass dish. Pour the main marinade over the chicken, turning pieces to coat completely. Seal tightly and refrigerate for a minimum of 1 hour, up to 8 hours for deeper flavor penetration.
04 - Heat grill to medium-high setting (approximately 375°F to 400°F). Lightly oil the grates with a paper towel dipped in vegetable oil to prevent sticking.
05 - Remove chicken from the bag, letting excess marinade drip off. Discard the used marinade. Pat chicken lightly with paper towels if overly wet.
06 - Place chicken on preheated grill. Cook for 6 to 8 minutes per side, brushing occasionally with the reserved marinade during the first half of cooking. Continue until internal temperature reaches 165°F and juices run clear when pierced.
07 - Transfer grilled chicken to a clean platter and tent loosely with aluminum foil. Allow to rest for 5 minutes to let juices redistribute throughout the meat.
08 - Sprinkle chopped fresh cilantro over the rested chicken and arrange lime wedges alongside. Serve immediately while hot.