I just finished one, still needs some more aging, but so far so good:
6# light DME
1# Chocolate malt
.5# Roasted barley
1oz pearle (60 min)
.5oz williamette (5 min)
Also I added about a 1/4 cup of unsweetened Hershey's cocoa powder.
I don't think all my lactose dissolved right, so it isn't overly sweet. Nice mouthfeel, great chocolate aftertaste, with coffee notes as well.