I have one of those recipes that is super easy, yet always popular at EVERY party. I suppose I may as well share it...
Okay, now this is my super secret recipe... so handle with care! All amounts are approximate... I don't bother to measure. It's a little different every time.
I use a 4.5qt dutch oven
Melt about 1/2 stick of butter over medium heat
Add about 1 1/2 bags mini marshmallows, stirring constantly until melted
Add a BIG (if I had to guess, it is probably close to 1/4 cup) scoop of peanut butter and stir till melted
Keeping heat on, add whatever cereal you have in the house until the pot is nearly full (Cheerios - regular or honey nut, Reeses, Rice Krispies, Rice Chex, Corn flakes all work well - mix and match. Cereals that are too sweet -Capn Crunch for example - will make the gunk too sweet)
Stir to coat - this works pretty easily if you keep the heat on
Dump the gunk into a buttered casserole dish. Do not press down. Heat the pan to release any stuck bits.
Let cool.
That's it. Enjoy.