Creating these amazing Peanut Butter Rice Krispie Treats with Chocolate Swirl is simple if you follow these steps:

1. Prepare the Pan: Line a 9×13 inch baking pan with parchment paper, leaving some overhang for easy removal. Grease the parchment paper lightly with cooking spray.
2. Heat the Mixture: In a large saucepan over medium heat, combine the granulated sugar, light corn syrup, and a pinch of salt. Stir occasionally until the mixture comes to a gentle boil.
3. Add Peanut Butter: Remove the saucepan from heat and stir in the creamy peanut butter and vanilla extract until fully combined and smooth.
4. Mix in Rice Krispies: Gradually add the Rice Krispies cereal to the peanut butter mixture. Stir well until all the cereal is evenly coated.
5. Press into Pan: Transfer the mixture into the prepared baking pan. Use a spatula or your hands (lightly greased) to press it down evenly and firmly.
6. Melt Chocolate: In a microwave-safe bowl, combine the semi-sweet chocolate chips and unsalted butter. Microwave in 30-second intervals, stirring in between, until fully melted and smooth.
7. Swirl the Chocolate: Pour the melted chocolate over the Rice Krispie mixture. Use a knife or spatula to create swirls by gently dragging it through the chocolate and the Rice Krispie mixture.
8. Chill: Place the pan in the refrigerator for about 30 minutes to allow the treats to set.
9. Cut into Squares: Once set, lift the treats out of the pan using the parchment overhang. Cut into squares or rectangles as desired.
10. Serve: Enjoy your Peanut Butter Rice Krispie Treats with Chocolate Swirl immediately or store them in an airtight container.