My boys love this one too, it goes in a flash!
1 1/2 packages mini marshmallows
1/3 cup butter
1 regular box Golden Grahams Cereal
1/2 package semi-sweet chocolate chips
Grease a large bowl and 13X9 pan.
Melt butter and most of the marshmallows on the stove top. Remove pan from heat and quickly add 1 cup of marshmallows and chocolate chips and stir till chips are barely melted; this gives the texture of chips and some large marshmallow chunks. Pour over Golden Grahams. Toss carefully until coated trying not to crumble much cereal. Pour into the 13X9 inch pan, grease the outside of a ziplock bag or saran wrap, place on your hand and press the mixture firmly into the pan. I add some chips and marshmallows on top to look nice. Serve warm! You can microwave this a little if serving later. It's good cold, but it's amazing when it's gooey!