Granny Smith apples are small to medium sized fruits. Its shape varies from round, oval to conical. Its skin is smooth. It is firm, chewy and thick, when ripe, it turns bright green covered with white pores. Under the peel, its dense white flesh is crispy and slightly juicy, with a fine, grainy stiffness. Granny Smith apples have a balanced, sweet and acidic flavor with tangy, sour undertones.