a grain from a cereal plant such as rice or wheat that has not had anything removed from it, or a food made from this type of grain

For the cookies I would pick anything made with a whole grain, such as whole wheat flour or oats. 饼干的话，我会选全谷物的，比如说全麦面粉的或燕麦的。

Whole grains are much richer than processed grains in dietary fibre. 在饮食中，全谷物的营养比加工谷物的丰富得多。