Do you have any suggestions what I do with the remaining 400 ml of Stout? <!-- s:mrgreen: --><img src="{SMILIES_PATH}/icon_mrgreen.gif" alt="" title="Mr. Green" /><!-- s:mrgreen: -->
Well if you are set on not drinking it, add it to some stew or soup or something.
Or mix it with cream and brown sugar and boil for a few mins to make a lovely coffee like pancake syrup.