Prepare the Muffin Tin:
If using a silicone muffin tin, set it aside. If using a regular muffin tin, lightly grease it for easy removal.
Melt the Chocolate:
Melt the dark chocolate chips in a microwave-safe bowl or over the stovetop using a double boiler until smooth.
Mix in the Peanut Butter:
Stir the peanut butter into the melted chocolate until fully combined and smooth.
Add the Cereal:
Fold in the brown rice crisp cereal and stir until the cereal is evenly coated with the chocolate and peanut butter mixture.
Fill the Muffin Cups:
Spoon the mixture into the prepared muffin cups, filling each one evenly.
Set in the Freezer:
Place the muffin tin in the freezer for about an hour or until the crunch cups are fully set.
Serve and Enjoy:
Once set, remove the crunch cups from the muffin tray and enjoy. Store any leftovers in an airtight container in the fridge or freezer for a crunchy treat anytime.