Combine: Place all ingredients in a high-speed blender (see notes), in the order listed above.
Blend: Slowly increase blender speed to high as you blend for 30-45 seconds.
Enjoy: Pour into a tall glass and enjoy!
Notes
Blender: A high-speed blender such as a Vitamix does make a big difference for this smoothie, especially for kids who may be more texture averse. Regular blenders will work but the resulting texture won't be as silky smooth.