In the carafe of a high-speed blender, combine the baby spinach and your choice of milk.
Blend on high for 30-60 seconds, or until the spinach is completely liquefied and no leafy bits remain.
Add the frozen blueberries, tofu cubes, hemp seeds, and optional agave and allspice to the blender.
Secure the lid and blend again until the mixture is perfectly smooth and creamy.
Pour into a glass and enjoy immediately.
Freeze your tofu cubes ahead of time to make the smoothie extra thick and frosty without needing ice.