01 - Line an 8x8-inch baking dish with parchment paper, leaving overhang on the sides for easy removal.
02 - In a medium saucepan over low heat, combine the natural creamy peanut butter and pure maple syrup. Stir constantly for 2 to 3 minutes until fully melted and smooth.
03 - Remove the saucepan from heat and gently fold in the lightly crushed corn flakes until every piece is evenly coated with the peanut butter mixture.
04 - Transfer the mixture into the prepared baking dish and press down firmly into an even, compact layer. Place in the freezer for 20 to 30 minutes until completely firm.
05 - Set up a double boiler by placing a heatproof bowl over a pan of simmering water. Add the dark chocolate chips and coconut oil, stirring gently until completely melted and smooth.
06 - Remove the firm peanut butter layer from the freezer and lift it out of the dish using the parchment overhang. Cut into 12 even bars using a sharp knife.
07 - Using a fork or dipping tool, submerge each bar into the melted chocolate, allowing the excess to drip off. Place each coated bar onto a parchment-lined tray.
08 - Return the chocolate-coated bars to the refrigerator for at least 20 minutes, or until the chocolate shell is fully hardened and set.