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.
Notes
TO STORE: Smoothies are best enjoyed right after they’re made. However, you can save leftover smoothie for later or make ahead. Store in an airtight container and enjoy within a few hours to best taste and texture. Just keep in mind that the color will darken as the avocado oxidizes.