01 - Combine mango, lime juice, olive oil, honey, garlic, cumin, smoked paprika, salt, pepper, and chili flakes in a blender. Process until completely smooth and creamy.
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.
03 - Place chicken breasts in a large resealable plastic bag or shallow glass dish. Pour remaining marinade over chicken, turning pieces to coat evenly. Seal and refrigerate for at least 1 hour, or up to 8 hours for deeper flavor penetration.
04 - Heat grill to medium-high temperature (about 400°F). Lightly oil the grates with a paper towel dipped in vegetable oil to prevent sticking.
05 - Remove chicken from marinade and let excess liquid drip off. Discard the used marinade. Pat chicken lightly with paper towels for better searing.
06 - Place chicken on preheated grill. Cook for 6 to 8 minutes per side, brushing occasionally with reserved marinade during the last few minutes. Continue until internal temperature reaches 165°F and juices run clear.
07 - Transfer grilled chicken to a clean platter. Tent loosely with aluminum foil and allow to rest for 5 minutes, letting juices redistribute throughout the meat.
08 - Sprinkle chopped fresh cilantro over the chicken. Arrange lime wedges alongside. Serve immediately while hot.