Prepare the donut mix according to manufacturer's instructions and shape into long johns. Fry and let cool completely.
Fill each long john with banana cream filling and glaze. Let glaze set. Place whipped topping in a piping bag fitted with a star tip and pipe rosettes on top of each donut. Garnish with vanilla wafer cookies and banana chips.
Longjohn, Filling, Wafer, Cookie, Dried Fruit, Doughnut