I want to help!!
I want to help!! How do I join this group? someone post me a link pleeease?
Mushrooms could be a dwarven staple...mushroom beer, mushroom bread, mushroom soup, mushroom cake

. Dwarven Mushroom spirits could be in wide demand... For other foods, they could grow them in big fields, lit by the light of great huge lamps (sorta like greenhouse lights on a grand scale). I agree, bulettes would make excellent steeds/beats of burden/organic drillbits and tunnel diggers...only one question: what does bulette meat taste like?
Lava-powered is the way to go!!!
Oh by the way, something from my campaign's dwarven city: Fabulously rich by human standards, tales of dwarven riches are constantly inspiring wars and attempted thievery by the Humans and other surface dwellers, particularly by the adventurers...
The constant wars would make them very insular and isolationist...everyone would have a level or two in fighter.
How about mandatory milittary service? To get full citizenship or whatever, you have to serve so many years in the army...very useful due to constant greed-inspired wars...
The dwarves might be very distrustful of outsiders but trade with them anyway