Combine all ingredients in a blender and blend until smooth, about 1 minute.
If using optional mango topping, add to the wells of the popsicle mold. Pour the mixture into the mold, being careful not to overfill. Insert popsicle sticks and freeze overnight or 2-3 hours at the minimum.
When ready to enjoy, run under warm water and carefully remove each mango coconut ice cream bar from the mold.