You can definitely dump all ingredients in at once. I like to mix the powders with the liquids first to ensure everything is well mixed.
PREP AHEAD: Peel and cut banana, add 1 cup blueberries to ziploc bag and freeze. Measure and combine protein powder, peanut butter powder, and cinnamon in a container and dump into blender when needed.
Update: Video added on 4/28/17. Nutrition information estimated with My Fitness Pal.