Peanut Butter S'mores Cupcakes

I have a weakness. Well, actually, I have lots of them. But one of the biggies is the combination of peanut butter and chocolate. I don't know who first put those two leaders in the field of deliciousness together, but if I find him, I'm going to give him one of these cupcakes.

This is a Devil's Food cake with peanut butter chips, a layer of peanut butter on top, and a yummy marshmallow buttercream frosting topped with graham cracker crumbs. S'mores alone are delicious, but s'mores with peanut butter- divine!