Add the spinach and milk to a blender. Blend until the spinach is completely smooth.
Add the frozen blueberries, banana, and yogurt. Blend until smooth and creamy.
Add the ice a little at a time, blending after each addition until the smoothie reaches your desired consistency.
Divide between two glasses and serve immediately while cold.
Video
Notes
You can use regular milk, almond milk or soy milk for this recipe. Also, you can add in any of your favorite superfoods to add extra nutrients to this smoothies: chia seeds, flax seeds, etc.