Step 1: Make the First Chocolate Layer

1. Melt the Chocolate:
   In a microwave-safe bowl or over a double boiler, melt the milk chocolate chips, butterscotch chips, and peanut butter together. Stir until the mixture is smooth and creamy.
2. Spread in Pan:
   Spread the melted chocolate mixture evenly in a greased 9×13-inch baking pan.
3. Chill:
   Place the pan in the refrigerator and chill until the first chocolate layer sets, about 30 minutes.

Step 2: Prepare the Marshmallow Layer

1. Melt the Butter:
   In a saucepan over medium heat, melt the butter.
2. Add Sugar and Evaporated Milk:
   Stir in the sugar and evaporated milk, and cook until the sugar dissolves.
3. Boil:
   Bring the mixture to a gentle boil for about 3 minutes, then remove from heat.
4. Mix the Ingredients:
   Stir in the marshmallow crème, peanut butter, vanilla extract, and chopped peanuts. Mix until smooth.
5. Pour Over Chocolate Layer:
   Pour the marshmallow mixture evenly over the chilled chocolate layer. Return the pan to the refrigerator and chill until the marshmallow layer is set, about 30 minutes.

Step 3: Create the Caramel Layer

1. Melt the Caramel:
   In a microwave-safe bowl or saucepan, melt the caramel cubes and heavy cream together. Stir until smooth and creamy.
2. Pour Over Marshmallow Layer:
   Pour the caramel layer evenly over the set marshmallow layer. Return the pan to the refrigerator and chill until firm, about 30 minutes.

Step 4: Add the Final Chocolate Layer

1. Melt the Chocolate:
   Repeat the process for the first chocolate layer: melt the milk chocolate chips, butterscotch chips, and peanut butter until smooth.
2. Spread Over Caramel Layer:
   Spread the melted chocolate evenly over the caramel layer.
3. Chill:
   Chill in the refrigerator until the entire dessert is firm, about 2-3 hours.