Add frozen banana, frozen avocado, spinach, chia seeds, vanilla extract, almond milk, and Greek yogurt to the blender. Blend for 30 seconds to a minute, until no spinach shreds remain.
Add protein powder, and pulse 4-5 times until combined. Serve!
Freezer Packs:
To make a freezer pack, add banana, avocado, spinach, chia seeds, and vanilla into a large wide-mouth jar or quart sized ziplock. Freeze for up to 3 months.
When ready to make your smoothie, add the contents of the smoothie pack, Greek yogurt and protein powder into your blender and blend until smooth.