01 -
Measure Rice Krispies into large bowl. Spray 9x13-inch baking dish with cooking spray and set aside.
02 -
Cook butter, sugar, and corn syrup over medium-low heat, stirring until hot but not boiling and sugar dissolves.
03 -
Remove from heat and add peanut butter. Stir until melted and mixture is cohesive.
04 -
Pour peanut butter mixture over cereal and stir until evenly coated. Spread in prepared pan.
05 -
Use wax paper and mini rolling pin or hands to flatten top for smoother topping.
06 -
Microwave chocolate chips, butterscotch chips, and optional oil at half power in 20-second increments until melted.
07 -
Spread melted chocolate mixture evenly over bars. Let set before cutting.