BuyingThey share a name, but green and black cardamom come from different plants and taste completely different. Using one in place of the other can change a dish entirely.
Green cardamom
Small, smooth green pods from the plant grown in the Western Ghats — the kind we grow. The flavour is sweet, floral and cooling. It is the cardamom of chai, sweets, biryani and Scandinavian baking.
Black cardamom
Large, rough, dark brown pods from a related plant grown mainly in the eastern Himalayas. They are usually dried over fire, which gives them a smoky, earthy, camphor-like flavour. They suit slow-cooked meat dishes and dals, but not desserts.
Which should you buy?
If a recipe just says "cardamom", it almost always means green. Keep black cardamom for recipes that ask for it by name.