Pale Malt, Maris Otter (3.0 SRM) Grain 72.0 %
Caramunich Malt (56.0 SRM) Grain 8 %
Chocolate Malt (450.0 SRM) Grain 7 % (UK Maltster!!)
Munich Malt (9.0 SRM) Grain 7 %
Carafa II (412.0 SRM) Grain 3 % (This gives a nice mocha, but go with Black Malt if you want more bite)
Oats, Flaked (1.0 SRM) Grain 3 %
Bittering with Nugget/Northern Brewer/Perle/Columbus/Fuggle
Finish with Willamette
Mash @ 68c
Ferment with neutral mid/high attenuation yeast. US05, Wy1728, Denny Fav, Pacman
I like the above recipe for a 6.2-6.5% abv, 35-42ibu.
Use UK chocolate malt and you will get a rich lush chocolaty flavour.