Looking to brew an imperial coffee stout soon. Are there any suggestions in the amount to brew with when to add it? I have heard adding it to the end of the boil will add flavor as well extract some of the caffeine, thoughts? As well what would be the best time to add chocolate to get maximum flavor and gravity increase. I was contemplating boiling water and melting chocolate and adding it to the fermenter... or maybe the boil kettle. what do you think?