01 -
Grease a 23 × 33 cm rectangular baking dish with a thin layer of non-stick spray and set aside.
02 -
Transfer puffed rice cereal to a large mixing bowl and set aside.
03 -
In a medium saucepan, mix granulated sugar and light corn syrup. Warm gently over low heat, stirring, until the mixture is just dissolved and no longer grainy. Do not allow to boil.
04 -
Remove saucepan from heat. Stir in peanut butter and vanilla extract until fully blended and smooth.
05 -
Pour the warm peanut butter mixture over the puffed rice cereal. Stir thoroughly to ensure even coating.
06 -
Transfer the coated cereal mixture into the prepared baking dish. Spread evenly and press down firmly to compact the layer.
07 -
Place chocolate chips and butterscotch chips into a microwave-safe bowl. Microwave in 30-second increments, stirring after each, until completely melted and smooth.
08 -
Pour the melted chocolate-butterscotch mixture over the pressed cereal layer in the pan. Spread evenly to cover.
09 -
Allow the topping to firm up at room temperature before cutting into squares for serving.