Step 1: Prepare the Pan - Line a 9x9-inch baking pan with parchment paper, leaving overhang for easy removal.
Step 2: Mix the Base - In a mixing bowl, combine melted salted butter, powdered sugar, brown sugar, crushed graham crackers, and creamy peanut butter. Stir until well combined.
Step 3: Press into the Pan - Transfer the mixture to the prepared baking pan and press it down evenly using a spatula.
Step 4: Melt the Chocolate - In a microwave-safe bowl, combine the semi-sweet chocolate chips and additional creamy peanut butter. Heat in 30-second intervals until smooth.
Step 5: Spread the Chocolate Topping - Pour the melted chocolate over the pressed peanut butter base and spread it evenly.
Step 6: Chill and Set - Place the pan in the refrigerator for at least 2 hours until firm.
Step 7: Slice and Serve - Once set, lift the bars out using the parchment overhang, cut into squares, and serve.
