Quick and Easy Cereal Bars

I LOVE these cereal bars. I found them on my friend Courtney's blog last year. They are really easy to put together and really tasty! They're also great to have for a relatively nutritious after school treat. Beware though, they are addicting!

1 bag mini marshmallows
1/4 cup butter
1/2 cup peanut butter
4 cups cheerios
3 cups rice krispies (or omit rice krispies and and add 2 more cups of cheerios)
1 cup m&m's (best if frozen when added)

In a saucepan or microwaveble bowl, bring the marshmallows and butter to a boil. Add peanut butter, stir well, and heat for one more minute. Add the cereal to the melted mixture and stir well. Add m&m's and stir gently. (If they are not frozen, they will begin to melt quickly!) Press into greased 9X13 pan. Let it cool and serve (we cooled ours in the fridge so we could serve it quickly to the kids.)