Chocolate Fluffer-Nutter Bars
In a large bowl, combine cake mix, peanut butter, egg, water and vanilla. Stir well. Press into bottom of a lightly greased 13x9 pan and bake at 350 for 20 minutes. Remove from oven and let cool for 15 minutes. Spread marshmallow cream over top of peanut butter mixture (if you have trouble with this step, try stirring in 1 tablespoon of milk into the marshmallow cream to thin it out a little). Remove foil from top of frosting container and place container in microwave for 30 seconds. Stir the frosting, which should now be liquid, and pour over top of marshmallow cream. Let pan sit for 2-3 hours or until the chocolate topping has firmed up, and cut into bars.