Preheat oven to 350 degrees. Grease a 9x13" baking pan well with butter. Make sure you get every inch greased well to avoid sticking.

Combine the chocolate chips and butter in a large, microwavable bowl from the brownie ingredients. Microwave in 30 second intervals until the chocolate is melted and smooth, stirring between intervals. Whisk in sugar, eggs and vanilla until combined.

Stir in flour and salt until just combined. Spread half of the batter into the bottom of the prepared pan in an even layer. Bake for 18 minutes. Remove from the oven (keep the oven on!) and let the brownies cool for 20 minutes.

For the caramel filling, combine cream and caramels in a microwave-safe bowl. Microwave in 30 second intervals, stirring in between, until melted and combined. Spread the caramel over the bottom brownie layer. Scoop the remaining brownie batter over the caramel layer evenly (this is a bit tough and your batter will mix a little with the caramel layer - don't worry, you are covering it with peanut butter and chocolate in a little bit!). Bake for 20 minutes. Transfer pan to a wire rack and let cool completely (about 1 hour).

Prepare the peanut butter filling by beating ingredients together in a large bowl. Spread evenly over the cooled brownies.

In a small microwavable bowl, microwave the chocolate topping ingredients for 30 to 60 seconds and stir until smooth (microwave longer if needed). Cool 10 minutes and spread over the peanut butter filling.

Refrigerate for 30 minutes or until the chocolate topping is set before slicing with a very sharp knife and serving.