This is a classic treat, but it is usually made in a big batch. I came up with this individual version one day when I was scouring the pantry for something sweet. I guess you can pat it into a square if you REALLY want to be authentic, but that would probably be quite messy, time-consuming, and it's easier to just eat it right out of the bowl.
- Put the marshmallows and the butter in a medium bowl, and microwave it for about 20 seconds on HIGH. The marshmallows will puff a lot.
- Take the bowl out of the microwave, and stir in the cereal, making sure it is all coated in marshmallow.