In a blender, combine the frozen cherries, frozen banana, almond milk, cocoa powder, chia seeds, honey/maple syrup, and vanilla extract.
If using, add the Greek yogurt for extra creaminess and protein.
Blend on high until smooth and creamy, making sure there are no lumps. You may need to stop and scrape down the sides to ensure everything is incorporated.
Taste and adjust sweetness if desired by adding more honey or maple syrup. Blend again if you add anything.
Pour the smoothie into glasses and top with a sprinkle of chocolate shavings or cocoa nibs for a touch of crunch.
Notes
Add Greek yogurt for extra creaminess and protein.