Start by lining your 9x9 inch baking dish with parchment paper.
In a large mixing bowl, combine the corn flakes, brown rice krispies, 2/3 cup of creamy peanut butter, 1/3 cup honey, and maple syrup. Mix until the dry ingredients are well coated and the mixture begins to hold together. Press this mixture firmly into the prepared baking dish to create an even base.
In a separate bowl, mix together the oat flour, cashew butter, 1/4 cup honey, salted butter, vanilla extract, and mini chocolate chips. Stir until everything is well combined and has a dough-like consistency. Spread this cookie dough layer over the prepared base, smoothing it out with a spatula.
Using a double boiler or a microwave-safe bowl, melt the 12 ounces of chocolate chips until smooth. If using the microwave, heat in 30-second intervals, stirring in between to avoid burning. Once melted, pour the chocolate over the cookie dough layer and spread it evenly.
If desired, sprinkle a pinch of sea salt over the chocolate layer.
Place the baking dish in the refrigerator for at least 2 hours, or until the chocolate is set. Once firm, lift the bars out using the parchment paper and cut them into squares.