Add the blueberries, kale, banana, ice, almond milk, and protein powder to a blender.
Blend until completely smooth, adding more almond milk if needed to thin the smoothie.
Pour into glasses and serve right away.
Notes
Frozen blueberries make the smoothie thicker and colder. Start with 2/3 cup almond milk and add more if the blender needs help moving. Remove any tough kale stems if your blender is not very powerful. Serve the smoothie right away for the best texture.