Start by lining your 9x9-inch baking pan with parchment paper, leaving some overhang for easy removal later. If you prefer, you can also grease the pan lightly with a bit of butter.
In a mixing bowl, combine the melted butter, graham cracker crumbs, powdered sugar, and ¾ cup of creamy peanut butter. Stir until everything is well combined and forms a thick mixture.
Transfer the mixture to your prepared baking pan. Using a spatula, press down firmly to create an even layer. Make sure it’s compact so the bars hold together well.
In a microwave-safe bowl, combine the white chocolate chips. Heat in the microwave in 30-second intervals, stirring in between, until the chocolate is completely melted and smooth.
Once the white chocolate is melted, stir in the 2 tablespoons of creamy peanut butter until fully combined. This will give the chocolate a delicious peanut butter flavor.
Carefully pour the melted white chocolate mixture over the pressed graham cracker base. Use a spatula to spread it evenly across the top.
Place the pan in the refrigerator and chill for at least 2 hours or until the bars are firm and set.
Once set, lift the bars out of the pan using the overhanging parchment paper. Cut into squares or rectangles, and serve. Enjoy your No-Bake Double Peanut Butter Bars with friends and family—or keep them all to yourself!