In a large sauce pan over medium heat, melt 8 tbsp of butter.
Once butter is melted, add 5 cups of mini marshmallows. Mix constantly until fully combined.
Then, add vanilla extract and 1/4 cup of the banana pudding mixture. Mix until combined and remove from heat.
Add in 6 cups of rice krispies cereal, 1 1/2 cup of mini marshmallows, 1 cup of crushed vanilla wafers and mix throughly.
Transfer to a baking dish lined with parchment paper. Spread out evenly pressing down just enough to form. This step is very important and will lead to crispy and gooey treats!
Drizzle with the banana pudding mixture.
Top with remaining crushed up vanilla wafer and drizzles of melted marshmallow fluff.
In separate small microwave safe bowls, melt the white chocolate in 10 second intervals until smooth.
Drizzle over rice krispie treats and let cool.
Cut and enjoy!