Line an 8-inch (20-cm) square baking dish with parchment paper. Set aside.
In the bowl of a food processor, add the dates, peanut butter, and agave or honey and process into a paste.
Heat this mixture in a saucepan over low heat, or in the microwave for about 1 minute, until warm and loosened.
Transfer to a medium bowl and add the crisp rice, oats, peanuts, flax seeds, cinnamon, and chocolate chips. Stir or knead together until evenly combined.
Press evenly and firmly into the prepared pan, then cover and refrigerate until firm, about 1 hour.
Cut into 9 bars and store in an airtight container in the fridge between sheets of parchment paper for up to 10 days.