Wash the spinach leaves thoroughly under running water to remove any dirt or grit.
In a blender, combine the spinach, banana, almond milk, Greek yogurt, and honey (if using).
Add the ice cubes to the blender for a chilled and refreshing texture.
Blend on high speed until all ingredients are smooth and well combined, about 30-60 seconds.
Taste the smoothie and adjust sweetness if necessary by adding more honey.
Pour the smoothie into two glasses and serve immediately.
For extra nutrition, consider adding a tablespoon of chia seeds or flaxseeds to the blender.
Make sure to adjust the consistency by adding more almond milk if you prefer a thinner smoothie.
Customize the smoothie with other fruits like mango or berries for different flavors.