Melt the Chocolate. In a microwave-safe bowl, combine the chocolate chips and coconut oil. Microwave in 30-second intervals, stirring after each, until completely melted and smooth.
Add Vanilla Extract. Stir in the vanilla extract for enhanced flavor.
Fold in the Cereal. Gently fold in the crispy rice cereal until evenly coated with the melted chocolate mixture.
Pour the Mixture. Pour the chocolate-cereal mixture into a lined 8x8-inch baking dish, spreading it out evenly with a spatula.
Chill. Place the dish in the refrigerator for about 1 hour, or until the mixture is firm and set.
Cut into Bars. Once set, lift the mixture out of the dish using the parchment paper and cut it into bars or squares of your desired size.
Enjoy. Serve your homemade Crunch Bars immediately or store them in an airtight container in the refrigerator for up to 2 weeks.