one at a time, beating well after each addition... Add the flour, cocoa, vanilla and salt, creaming well then add the pecans if desired... 2) Bake in a well greased and floured 9" x 13" cake pan, at 350� for 30 min... remove and spread the marshmallow fluff evenly on the top, and return to the oven for 1 min or until fluff is spreadable... 3) Spread the frosting on top of the fluff and refrigerate until ready to eat...