Line a baking dish with parchment paper.
In a large bowl, mix together the cereal, nut butter, and honey (or other sweetener) until well combined.
Transfer the mixture to the prepared baking dish and press it down firmly to flatten it evenly.
Place the baking dish in the refrigerator for at least 1 hour to set.
Once set, cut the mixture into bars.
Store the cereal bars in an airtight container in the refrigerator.
