I wanted a LOT of chocolate flavor in my Chocolate Stout and used 1.5 cups of Ghiradhelli sweet cocoa with 10 minutes left in the boil. It worked very well, and the beer has a very strong chocolate flavor. Adding a little bit of vanilla helped too, it really brought out the chocolate flavor. It sort of... sweetened it up a bit. I really recommend the cocoa and some lactose, just be careful not to use too much. If you want the chocolate to be merely an aftertaste maybe don't use 1 1/2 cups. Good luck!
Samuel Waterston Beer Co.
Thinking About: Strawberries and Cream Ale
Primary Fermenter: Nuthin...
Secondary Fermenter:"C-4 IPA!", American Wheat
Conditioning: 4 C's IPA
Drinkin': 4 C's American Pale Ale