De O Livro Completo dos Anões , 2ª edição, uma resposta vem. Não há resposta para o meu conhecimento ainda de 5e.
Basicamente, eles usam gado de colina e montanha, cultivam trigo centeio e cevada, complementando isso com o comércio de seres humanos. Aqueles que não podem acessar a superfície usam vários cogumelos cuidadosamente criados.Dwarves enjoy a wide variety of food, with a preference for meat. Hill, mountain, and sundered dwarves keep cattle, goats, sheep, pigs, and fowl. These animals are grazed above ground on upland meadows or plateaus. Sundered dwarves keep their livestock close to home, hill and mountain dwarves allow their stock to roam. Although meat is a staple of their diet, large quantities of grains are also consumed. When possible wheat, rye and barley are grown close to the stronghold. They are harvested and kept in underground granaries. Many who live close to humans buy large quantities of grain to supplement their own production. Dwarves who live in the deep earth substitute various types of fungi for grains. Like the giant lizards and beetles, many of these fungi have been carefully bred to produce a wide variety of flavors to excite the palate. Most are very careful about the kinds of fungi they eat. Dwarven cooking also makes use of vegetables for flavor and variety. They do not eat spicy or heavily seasoned food, and consequently dwarven cooking tastes bland to humans and elves, but the food is wholesome, consisting of thick stews served on broad slices of bread. While they are not voracious eaters, few humans or elves can eat as much as a dwarf in a single meal. (p. 26)
No livro D & D 3.5 Raças de Pedra , uma breve menção é feita:
They rely on underground flora and fauna for their food supply, so the type of earth available must be able to support these crops. (p. 27)