Set oven on low broil.
Line a baking sheet with silicon mat or parchment paper.
Spread marshmallows on prepared sheet.
Place under broiler just until marshmallows begin to brown.
Remove silicone mat or parchment paper immediately from pan and place in freezer for 10-15 minutes.
The marshmallows may still be too sticky for you to handle so you can optionally dust them with powder sugar to reduce stickiness.
Combine marshmallows, chocolate and cereal in bowl 1 handful at a time to mix well.