They impart not only a sweet, lemony essence but a one-of-a-kind wondrous flavor to authentic Thai dishes including curries, soups, salads, stir-frys, fish cakes and noodle dishes. Use like a bay leaf to flavor broth or stews. Kaffir Lime Leaves are a profusely fragrant tropical citrus fruit leaf with a one-of-a-kind striking flavor that is citrusy and floral. They are indispensable in Thai cooking and cannot be substituted with other kinds of citrus leaves. Their exotic aroma permeates and enhances all other seasonings in an extraordinary way.