Using a clean coffee grinder or spice mill, grind the chia seeds into a fine powder. This is key for a smooth, thick consistency.
Transfer the ground chia to a high-speed blender.
Add the almond milk, banana, hemp seeds, protein powder, cocoa powder, and vanilla extract.
Blend on high until the mixture is completely smooth and creamy, scraping down the sides if necessary.
Add the optional cacao nibs and coconut sugar, if using. Pulse a few times to incorporate, or blend longer if you prefer them fully mixed in.
Serve immediately.