Add ice, cherries, almond milk, cocoa, collagen, and vanilla to blender
Add spinach if desired
Blend very well
Test to make sure all ice has blended, adjust liquid if needed
Enjoy
Notes
My vitamix can handle the ice, frozen cherries and small amount of liquid easily. Some blenders may need the ice and almond milk blended first, and then the cherries added. Please experiment and let me know what works well for you.