Line an 8x8” pan with parchment paper and spray with non-stick cooking spray. Set aside.
Heat granulated sugar and corn syrup in a large, heavy saucepan over medium heat, stirring continually, until mixture comes to a rolling boil.
Stir in peanut butter and remove from heat. Set aside.
Add Rice Krispies to a large bowl. Pour peanut butter mixture over the cereal and mix to combine.
Spread the Rice Krispies mixture evenly in the prepared baking pan. Wet the back of a spoon to help spread out without sticking. Set aside.
In the microwave, melt the chocolate and butterscotch chips in a large glass bowl (or two separate bowls, if preferred). Heat for 1 minute and then stir. Then, heat in 30-second intervals, stirring in between, until the chips are completely melted.
Pour chocolate-butterscotch mixture over the cereal mixture in the baking pan and spread out evenly.
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Refrigerate for 2 hours or until chocolate hardens.
Remove from refrigerator and slice into 9 pieces before serving. Enjoy!