Combine pudding mix and BOOST® Vanilla in a mixing bowl. Beat with wire whip or electric mixer for 1 minute; refrigerate for 1 hour. (Pudding will be thick but not firm.)
Fold 1 cup non-dairy whipped topping into the pudding.
Layer vanilla wafers along the bottom and up the sides of a 1½ quart glass serving bowl. Arrange half the sliced bananas over the wafers and top with pudding.
Arrange remaining bananas on top of pudding and garnish with dollops of whipped topping. Chill until ready to serve.