Start by greasing a 9x13 inch baking dish with a light coating of butter or cooking spray.
In a large mixing bowl, combine the Karo syrup, peanut butter, and sugar. Mix well until everything is thoroughly combined.
Gently fold in the Corn Flakes, ensuring they are evenly coated with the peanut butter mixture.
Transfer the mixture into the prepared baking dish. Use a spatula or your hands to press it down firmly and evenly.
In a microwave-safe bowl, heat the chocolate chips in 30-second intervals, stirring in between, until fully melted and smooth.
Once melted, pour the chocolate over the pressed Corn Flake mixture. Use a spatula to spread it evenly across the top.
Place the dish in the refrigerator for about 1-2 hours, or until the chocolate has fully set. Once set, remove from the fridge and cut into bars or squares as desired.