Check berries after 30 minutes, adding more water if necessary to cover. Taste for doneness every 5-10 minutes thereafter. When done, berries should be round, fully plump, softly chewy (beyond al dente) with no white starch remaining. It may take 45 minutes to an hour to finish taking up water, i.e. to be fully cooked. One cup dry wheat berries yields about four cups of cooked wheat berries.