Line an 8×8-inch baking dish with parchment paper, leaving some overhang on the sides for easy removal later.
Add crispy rice cereal to a large mixing bowl and set aside.
In a microwave-safe bowl or small saucepan, combine peanut butter, chocolate chips, maple syrup, and coconut oil.
If using the microwave, heat in 30-second intervals, stirring between each, until completely melted and smooth. If using the stovetop, heat over low heat, stirring constantly until melted.
Pour the chocolate mixture over the crispy rice cereal and fold gently but thoroughly until all cereal is evenly coated.
Transfer the mixture to the prepared baking dish and press down firmly to create an even layer.
Refrigerate until completely firm, at least 1 hour.
Once firm, lift out of the pan using the parchment paper overhang and cut into bars on a cutting board.
Serve and enjoy!