Step 1: Prepare Your Pan - Line a 9x9-inch baking pan with parchment paper, allowing some overhang for easy removal later.
Step 2: Mix the Base - In a large mixing bowl, combine the melted salted butter, powdered sugar, brown sugar, and creamy peanut butter. Stir until well combined and smooth.
Step 3: Add the Graham Crackers - Fold in the crushed graham crackers gently until they are evenly coated with the peanut butter mixture.
Step 4: Press into the Pan - Transfer the mixture into the prepared baking pan. Use a spatula to press it down evenly.
Step 5: Melt the Chocolate - In a microwave-safe bowl, combine the semi-sweet chocolate chips with 1/4 cup of creamy peanut butter. Microwave until melted and smooth.
Step 6: Spread the Chocolate Layer - Pour the melted chocolate mixture over the pressed peanut butter base and spread it evenly.
Step 7: Drizzle Extra Peanut Butter - Microwave the remaining 2 tablespoons of creamy peanut butter for about 15 seconds and drizzle it over the chocolate layer.
Step 8: Chill and Set - Cover the pan with plastic wrap and refrigerate for at least 2 hours or until firm.
Step 9: Slice and Serve - Lift the bars out of the pan and cut them into squares or rectangles.