Made a pan of S'mores Brownies today. Probably overkill, but ridiculously easy.

Break up some graham crackers (or better yet, use whole Teddy Grahams--they have a better consistency after baking) and either chop some marshmallows into quarters, or use mini-marshmallows. Make a bowl of your favorite brownie mix or scratch brownies. Stir in the Teddy Grahams and marshmallows and bake as directed.

I like to frost mine with chocolate glaze or milk chocolate frosting, just to up the gooeyness factor. And as usual, I maintain that they are best when still slightly warm. Oh, and a scoop of really good vanilla ice cream doesn't diminish them in the least.