Brew coffee and let it cool slightly for a smoother blend.
Add banana, coffee, protein powder, milk, and ice to the blender.
Blend until creamy and silky with no banana chunks remaining.
Pour into a glass and enjoy immediately while cold and frothy.
Notes
Blend longer for a silky texture or use less ice for a softer drink. Freeze banana slices ahead for extra creaminess. Pour immediately for easiest serving. Add cinnamon, cocoa, or vanilla for flavor twists. Store leftovers chilled up to one day.