01 - Place the diced mango, chopped cucumber, coconut water (or plain water), and fresh lime juice into a blender.
02 - If using honey or agave syrup and fresh mint leaves, add them to the blender now.
03 - Blend on high until the mixture is completely smooth and no chunks remain.
04 - Taste the smoothie and adjust sweetness by adding more honey or agave syrup as needed.
05 - Add ice cubes if a colder, thicker consistency is desired and blend again briefly.
06 - Pour into glasses and serve immediately for the freshest flavor.