Sorrel/ˈsɔːrəl/ Definition 1 of 2Pro Tip 1/3Culinary Uses Sorrel is used in cooking for its tangy, slightly sour taste. Chop the fresh sorrel finely to dress the salad. Pro Tip 2/3Soup Ingredient Often found in recipes for soups to give a lemony flavor. The sorrel soup had a delightful citrusy twist. Pro Tip 3/3Not Always Red While some sorrel leaves are reddish, they can also be green. I mistook the green leaves for spinach, but they were actually sorrel.