Scotcheroos (also known as scotch bars) are like a peanut butter rice krispie treat made with karo syrup and topped with a rich chocolate butterscotch frosting.
Combine corn syrup and sugar in a large saucepan over medium heat. Heat, stirring occasionally, until the mixture barely reaches a boil.
Remove from heat and stir in peanut butter until smooth.
Add the cereal and stir to coat.
Press the mixture evenly into the prepared pan.
In a small microwaveable bowl, microwave chocolate and butterscotch chips for 1 minute. Stir, then microwave in 30 second intervals, stirring in between, until just barely melted.
Spread over bars and let cool completely before cutting and serving.