Add parchment paper to a bkaing sheet and spread the popped popcorn onto it.
Add the cereal evenly and 1 1/2 cups of the mini marshmallows.
Add the semi-sweet chocolate chips to a microwave-safe bowl and microwave for 1 minute. Stir, then head for 10-20 second intervals until smooth and melted.
Put the melted chocolate into a plastic squeeze bottle. (this can be optional)
Drizzle the popcorn with the melted chocolate, then sprinkle the rest of the marshmallows and mini chocolate chips.
Let it set for 15 minutes or until the chocolate has firmed.