A fox nut, also known as a makhana, is the seed of the lotus flower. It's a crunchy, edible nut that's high in protein and fiber. Fox nuts are found in shallow ponds and lakes in tropical and subtropical regions of Asia. They have a slightly sweet flavor and can be eaten raw, roasted, or boiled. Fox nuts are often used in Indian and Chinese cuisine, and they can be added to stir-fries, curries, and salads.