When you wish upon a star (fruit) you get the sweet and sour taste of a delicious and nutritious ingredient also known as carambola. When cut across the middle, star fruit stays true to its name and visually looks like a five-point star with a sweet-tart taste. When ripe, star fruit appears mainly bright yellow with tinges of light green. They may have a dark brown tone along the ridges, which is expected as the flesh should still be quite firm. Overly ripe star fruit turns entirely yellow with brown spots all over.