In a medium sizes saucepan over medium heat stir together granulated sugar and corn syrup. Allow the sugar to melt and come to a slight boil-just the edges of the mixture should be boiling.
Remove from heat. While mixture is still warm, stir in the peanut butter until smooth.
Stir in crisp rice cereal until combined. Press into well greased 9x9 pan.*
For the chocolatey topping
In a medium sized saucepan over low heat mix together butterscotch chips, both kinds of chocolate chips, and creamy peanut butter until melted. Stir constantly. Alternatlively, you can pour the chips and peanut butter in a microwave safe bowl and microwave at 30 second intervals stirring in between until chocolate is melted.
Spread chocolate mixture on top of bars. Sprinkle flakey sea salt on top of chocolate. Allow to cool and enjoy!
Notes
If you don't want them as thick, press bars into a 9x13 pan instead