Melt the butter and marshmallows by combining them in a microwave-safe bowl and heating on high for 1-2 minutes until melted and smooth.
Add peanut butter and caramel to the melted mixture and stir until well combined and creamy.
In a large mixing bowl, combine Rice Krispies and peanuts, then pour the melted mixture over and fold gently to coat.
Fold in the chopped Snickers bars carefully, keeping chunks intact.
Transfer to a greased baking pan and press the mixture firmly and evenly.
Melt the chocolate chips in a microwave-safe bowl and drizzle over the pressed mixture.
Drizzle additional caramel on top and sprinkle with extra peanuts.
Let cool for 30 minutes, then cut into squares or rectangles to serve.
