Combine bananas, ice cream and milk in blender on high speed until smooth.
Set aside.
To decorate glasses, drizzle Smucker's Strawberry Sundae Syrup from top inside rim vertically, allowing the syrup to pool in the bottom of the glasses.
Continue the pattern around the rim of the glass to create a striped effect.
Pour milkshake into the center of glasses, being careful not to touch the sides.