I make these as a variation of Rick Krispie bars. They are a nice change and super easy to make.
1/4 cup butter
1 tbsp peanut butter
40 large marshmallows
7 cups of Frosted Flakes (or similar generic brand)
In a large pot, melt butter and peanut butter. Then add all of the marshmallows and melt on medium heat stirring often so it does not burn. Once everything is melted, remove pan from heat and stir in Frosted Flakes. Mix well. Spoon into a greased rectangle glass or metal baking dish and spread evenly over pan. Let cool and cut into squares. Watch them disappear!