In the bowl of a food processor, pulse Frosted Mini-Wheats together until shredded.
Add the shredded cereal to a large bowl with milk, cinnamon, chopped dark chocolate chips, and cocoa powder. Stir until well combined.
Divide the mixture between two small mason jars and cover.
Refrigerate overnight.
Before serving, top with a sprinkle of cinnamon and a few additional chocolate chips as desired.