1-In a large bowl, whisk together the: In a large bowl, whisk together the pudding mix and cold milk until smooth.
2-Whisk in the sweetened condensed milk until: Whisk in the sweetened condensed milk until fully combined.
3-Gently fold in the whipped topping until: Gently fold in the whipped topping until uniform and airy.
4-Slice the bananas about 1/4-inch thick: Slice the bananas about 1/4-inch thick.
5-Spread a thin layer of the pudding: Spread a thin layer of the pudding mixture in the bottom of a 9×13-inch dish.
6-Layer vanilla wafers, sliced bananas, and pudding: Layer vanilla wafers, sliced bananas, and pudding mixture, repeating until the dish is full.
7-Top with a final layer of wafers: Top with a final layer of wafers or crumbled wafers.
8-Cover and refrigerate for at least 4: Cover and refrigerate for at least 4 hours, or overnight for the best texture.
9-Serve cold, straight from the fridge: Serve cold, straight from the fridge.