You need 6c of cereal, 4c of mini marshmallows or a whole package of regular sized, and 3tbsp of butter.
Put the butter and marshmallows in a microwaveable bowl. *you can also do this on the stove in a pot, but I think it's easier in the microwave.
I microwaved mine for a minute and a half, and gave it a stir every 30 seconds.
Pour in the 6 cups of cereal.
Stir until the cereal is coated with marshmallow.
Line a pan with parchment paper, and scoop out the Rice Krispies. Press it down, and you can smooth it out, but I didn't really bother because it's just for me and my mom.
Let it cool and cut out pieces. This is super easy and fast, and I'm literally eating mine right now.