Oh, you mean like a black IPA. I guess I have never heard it called an India Dark Ale before.
I would either grind up some Carafa special (huskless) very fine just for color. or you could add .25-.33 lb of black patent and chocolate malt to an IPA recipe to add some roasty to it.
I don't know what the Iron Hill beer taste like but look at my Imperial Bastard recipe (drop down) for some ideas. Don't need BP or chocolate to get it dark, unless their beer is quite roasty.
Hi smokinghole, they don't sell sixers it is by the glass or a growler. thanks for the recipe.
they have a 2 pizza and a growler deal for around 28 bucks right now