Step 1: Prep the pan
Line an 8×8 or 9×9-inch baking pan with parchment paper, leaving some overhang for easy lifting.

Step 2: Create the bottom graham cracker layer
Lay whole graham crackers in a single layer across the bottom of the pan. Break crackers if needed to cover the full base.

Step 3: Make the peanut butter filling
In a medium bowl, mix melted butter, peanut butter, powdered sugar, vanilla, and salt until smooth. The mixture should be thick and creamy.

Step 4: Spread the filling
Pour the peanut butter mixture over the graham crackers and spread evenly with a spatula.

Step 5: Add the top layer of graham crackers
Place another layer of whole graham crackers on top of the peanut butter filling, gently pressing down to secure them.

Step 6: Melt and pour the chocolate topping
In a microwave-safe bowl, melt chocolate chips and 2 tablespoons peanut butter together in 30-second intervals, stirring until smooth. Pour over the top graham layer and spread evenly.

Step 7: Chill until set
Refrigerate for at least 1–2 hours, or until the chocolate is firm and the bars are set.

Step 8: Slice and serve
Use the parchment paper to lift the bars out of the pan. Slice into squares or rectangles with a sharp knife. Serve chilled or at room temperature.