In a blender, place the spinach, banana, almond milk, avocado, protein powder, and vanilla extract. Blend until smooth. To thicken, add a few ice cubes and blend. Continue to add ice a few cubes at a time until your desired consistency is reached.
Give it a taste. If you’d like the smoothie sweeter, add 1 to 3 teaspoons honey. Pour into a glass and enjoy immediately.
