Blend smoothie ingredients: Add spinach, cherries, banana, plant-based milk, and vanilla extract with the optional ice cubes to a blender. Blend until smooth, about 30 seconds to 1 minute. If smoothie is too thick, add more milk. If smoothie is too thin, add more cherries.
1 cup spinach, ½ cup cherries, 1/2 cup banana, ½ cup plant-based milk, 1 teaspoon vanilla extract, 1 tablespoon chia seeds, Optional: 2-3 ice cubes