Line a 9x13 baking pan with parchment paper or aluminum foil, leaving some overhang for easy removal, and set aside.
Combine the corn syrup and sugar together in a large saucepan and cook over medium heat, stirring frequently. Once the sugar is dissolved and the mixture starts to boil immediately remove it from the heat.
Stir in the peanut butter until well combined and smooth. Add half of the cereal and mix together until just combined, then add the rest of the cereal and mix until all of the cereal is coated.
Scoop the mixture into the prepared pan and firmly press it down into one even layer. Set aside.
Combine the semi-sweet chocolate chips and butterscotch chips in a large microwave-safe bowl. Microwave in 20-second increments, stirring well after each increment, until completely melted and smooth. Pour the melted chocolate on top and smooth it out into one even layer.
Transfer the bars to the refrigerator for 45 minutes or until the topping is firm. Remove from the pan, slice into bars, and enjoy!