Wheat berries are easy to cook, but cooking times can vary widely based on the type you buy. Because of this, during the cooking I periodically check the wheat berries for doneness. I start checking after 25 minutes and keep checking every 15-20 minutes. Soft wheat berries can cook in as little as 30 minutes, whereas hard ones sometimes need as much as 90. Have patience, and keep simmering until the grains are tender.