I have someone asking for a dark chocolate cake and a chocolate cake. I have a great chocolate cake recipe but not a DARK chocolate. Anyone have a good recipe? I prefer mix recipe.

http://www.epicurious.com/recipes/food/views/Double-Chocolate-Layer-Cake-101275

I use dark chocolate in this. And then, i chop more up and sprinkle it in the pan before it goes in the oven. Super rich. Then I pair it with chocolate SMBC.

I use this recipe and replace the cocoa powder w/dark chocolate coco powder.
http://cakecentral.com/recipes/1988/blue-ribbon-moist-and-fudgey-chocolate-cake