Gather your ingredients to make the blending process smoother.
In your blender, combine the ripe banana, frozen blueberries, yogurt, and milk. Blend until smooth and creamy.
Add the protein powder and nut butter to the mixture. Blend again until everything is fully incorporated.
Add the chia seeds and flax meal. Pulse a few times to combine, ensuring not to over-blend.
If using acai berry powder, sprinkle it in and give it one last quick blend.
Taste your smoothie. If desired, add a splash of honey or a few more blueberries, then blend again.
Pour your smoothie into a glass or mason jar, and enjoy immediately.