01 - 
                Line an 8x8-inch baking pan with parchment paper, letting the edges hang over for easy removal later.
              
              
              
                02 - 
                Spread the crushed pretzels evenly across the bottom of the prepared pan.
              
              
              
                03 - 
                In a microwave-safe bowl, combine caramel bits (or unwrapped caramels) with heavy cream. Microwave in 20-second intervals, stirring between each, until melted and smooth. Pour the melted caramel over the pretzel layer, spreading evenly with a spatula. Let it cool for a few minutes.
              
              
              
                04 - 
                In a separate microwave-safe bowl, melt chocolate chips and peanut butter together in 20-second intervals, stirring between each, until smooth. Pour the chocolate-peanut butter mixture over the caramel layer, spreading evenly.
              
              
              
                05 - 
                Refrigerate for at least 1-2 hours, or until fully set.
              
              
              
                06 - 
                Once set, lift the bars out of the pan using the parchment paper. Sprinkle with sea salt (if desired) and cut into squares or bars.