01 - 
                Frozen bananas can be substituted for fresh bananas and ice cubes for thicker texture
              
              
              
                02 - 
                Various milk alternatives like almond, soy, or cashew milk work well as substitutes
              
              
              
                03 - 
                Different nut butters can be used to customize flavor profile
              
              
              
                04 - 
                Optional additions include cocoa powder, spinach, flax seeds, or Greek yogurt