Prepare the ingredients:
If you haven’t done so already, peel the banana, core and chop the apple, and gather the rest of your ingredients.
Blend the smoothie:
Add the spinach, banana, chopped apple, yogurt, and juice (or milk) into the blender. Add the optional chia or flaxseeds for extra nutrition, and honey or maple syrup for sweetness. If you like a colder smoothie, throw in a handful of ice cubes.
Blend until smooth:
Blend on high for 30-60 seconds, or until everything is well combined and the texture is smooth. If the smoothie is too thick, add a bit more juice or milk to reach your desired consistency.
Serve:
Pour the smoothie into a glass or cup, and enjoy immediately!