Instructions

• Line a 9x9-inch baking dish with parchment paper, letting it hang over the edges for easy removal later. If you prefer, you can simply grease the dish.
• In a large mixing bowl, combine the heaping cup of creamy peanut butter, light corn syrup, granulated sugar, and packed light brown sugar. Stir well until everything is fully combined and smooth.
• Stir in the tablespoon of vanilla extract, mixing well. Then, gently fold in the corn flakes cereal until they are evenly coated with the peanut butter mixture.
• Transfer the mixture into the prepared baking dish. Using a spatula, press it down firmly and evenly into the bottom of the dish to create a solid base.
• In a microwave-safe bowl, combine the heaping cup of semi-sweet chocolate chips with the heaping cup of creamy peanut butter. Microwave in 30-second intervals, stirring in between, until completely melted and smooth.
• Pour the melted chocolate-peanut butter mixture over the pressed cornflake base. Use a spatula to spread it into an even layer. Then, dollop the additional ½ cup of creamy peanut butter on top and swirl it gently with a knife for a beautiful marbled effect.
• Refrigerate the bars for at least 2 hours, or until fully set. Once set, lift the bars out of the dish using the parchment paper and cut them into squares.