Preheat your oven to 350°F (175°C). Press the prepared chocolate chip cookie dough evenly into the bottom of a greased 9x13-inch baking pan. Bake for 12–15 minutes, or until golden brown. Remove from oven and let it cool slightly.
In a small saucepan over low heat, combine caramels, 1 tablespoon evaporated milk, and 1 tablespoon water. Stir continuously until the caramels are fully melted and the mixture is smooth. Pour the warm caramel evenly over the cooled cookie base. Set aside to cool and start setting.
In another saucepan, melt the unsalted butter over medium heat. Add the white sugar and 1/2 cup evaporated milk. Stir until the sugar is dissolved and the mixture begins to boil. Let it gently boil for 5 minutes, stirring constantly. Remove from the heat and promptly stir in the marshmallow cream and peanut butter until smooth. Immediately spread this mixture over the cooled caramel layer.
In a microwave-safe bowl, combine the chocolate chips and heavy cream. Microwave in 30-second intervals, stirring until smooth and glossy. Stir in the rice krispies cereal. Spread this final layer carefully over the marshmallow-peanut butter layer.
Refrigerate the bars for at least 1 hour, or until set firm enough to slice. Cut into squares and serve. Store leftovers in an airtight container in the fridge.
Notes
These bars can be stored in an airtight container in the refrigerator for up to 5 days or frozen for up to 2 months. Thaw overnight in the fridge or let sit at room temperature for about an hour before serving.