Speedy Little Devils

Directions

1. Mix devil's food cake with butter. Pat 1/3 of mixture on the bottom of a 9 by 13 inch baking pan.
2. Mix peanut butter and marshmallow cream. Spread on cake layer.
3. Crumble remaining cake mixture on top of peanut butter layer. Bake at 350 degrees F for 20 minutes. Cool completely before slicing into bars.