Black cardamom is, in most books, described as an inferior substitute to green cardamom, but this is simply untrue. In India, black cardamom has its special field of application, and although green and black cardamoms are frequently interchangeable, the black variety is felt superior for spicy and rustic dishes, while green cardamom is much preferred by the Imperial (Mughal) cuisine with its subtle blend of sweet fragrances.
Black cardamom can be used in rather liberal amounts, up to a few capsules per person. The smoky fragrance of the pure spice is not discernible in the finished dish; black cardamom cannot dominate a dish, but enhances and intensifies the taste of other ingredients.